Calvin Klein Underwear & Loungewear

As a pinnacle brand of luxury fashion, Calvin Klein underwear, loungewear and accessories have been providing opulent support, comfort and style since 1968. With all products proudly bearing the iconic CK emblem, this range is ideal for anyone looking to place some prestige within their wardrobe. Always simple and always classic, this designer brand is the messiah of modern apparel and a real leader in American sportswear. From underwear and pyjamas to sliders, this ultimate comfort collection from Calvin Klein won't disappoint.

  1. Calvin Klein Core Sleep Short Mens Loungewear Bottoms - Black https://internetfusion.imgix.net/1290326.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Sleep Short Mens Loungewear Bottoms - Black

    £35.95 £47.00 (Save 24%)
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  2. Calvin Klein Core Cooling Trunk 3 Pack Mens Boxer Shorts - Grey Heather Black White https://internetfusion.imgix.net/946042.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Cooling Trunk 3 Pack Mens Boxer Shorts - Grey Heather Black White

    £40.00
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  3. Calvin Klein Core Bikini 2 Pack Womens Brief - Black https://internetfusion.imgix.net/1172884.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Bikini 2 Pack Womens Brief - Black

    £26.00
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  4. Calvin Klein Core Cotton Stretch 3 Pack Low Rise Trunk Mens Boxer Shorts - Black https://internetfusion.imgix.net/1258229.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Cotton Stretch 3 Pack Low Rise Trunk Mens Boxer Shorts - Black

    £40.00
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  5. Calvin Klein Core CK One Womens Thong - Black https://internetfusion.imgix.net/1131656.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core CK One Womens Thong - Black

    £16.00
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  6. Calvin Klein Core Logo Waistband Sleep Short Mens Loungewear Bottoms - Grey Heather Flame Scarlet https://internetfusion.imgix.net/1132025.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Logo Waistband Sleep Short Mens Loungewear Bottoms - Grey Heather Flame Scarlet

    £42.00
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  7. Calvin Klein Core Carousel 3 Pack Womens Thong - Black White https://internetfusion.imgix.net/1258272.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Carousel 3 Pack Womens Thong - Black White

    £38.00
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  8. Calvin Klein Core Cotton Stretch Pack of 3 Mens Boxer Shorts - Multi https://internetfusion.imgix.net/560579.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Cotton Stretch Pack of 3 Mens Boxer Shorts - Multi

    £40.00
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  9. Calvin Klein Core 2 Pack Womens Thong - Black https://internetfusion.imgix.net/1137668.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core 2 Pack Womens Thong - Black

    £24.00
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  10. Calvin Klein Core Classic Mens Jogging Pants - Black https://internetfusion.imgix.net/1157692.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Classic Mens Jogging Pants - Black

    £47.00
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  11. Calvin Klein Core Cotton Stretch 3 Pack Low Rise Trunk Mens Boxer Shorts - Ks0 Grey Heather https://internetfusion.imgix.net/1459534.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Cotton Stretch 3 Pack Low Rise Trunk Mens Boxer Shorts - Ks0 Grey Heather

    £40.00
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  12. Calvin Klein Core Triangle Bra - Black https://internetfusion.imgix.net/1273948.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Triangle Bra - Black

    £36.00
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  13. Calvin Klein Core Basic Sleep Pant Mens Pyjamas - Black https://internetfusion.imgix.net/1131661.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Basic Sleep Pant Mens Pyjamas - Black

    £39.00
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  14. Calvin Klein Core Classic Mens Jogging Pants - Grey Heather https://internetfusion.imgix.net/1280105.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Classic Mens Jogging Pants - Grey Heather

    £37.95 £47.00 (Save 19%)
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  15. Calvin Klein Core Carousel 3 Pack Bikini Knickers - Black/white/black https://internetfusion.imgix.net/1258256.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Carousel 3 Pack Bikini Knickers - Black/white/black

    £38.00
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  16. Calvin Klein Core 3 Pack Hip Mens Brief - Black https://internetfusion.imgix.net/1319815.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core 3 Pack Hip Mens Brief - Black

    £37.00
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  17. Calvin Klein Core 3 Pack Mens Boxer Shorts - Black Waistband https://internetfusion.imgix.net/1258278.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core 3 Pack Mens Boxer Shorts - Black Waistband

    £40.00
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  18. Calvin Klein Core CK One Womens Loungewear Bottoms - Black https://internetfusion.imgix.net/1259207.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core CK One Womens Loungewear Bottoms - Black

    £40.00
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  19. Calvin Klein Core Unlined Bralette 2 Pack Bra - Grey Heather https://internetfusion.imgix.net/1255169.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Unlined Bralette 2 Pack Bra - Grey Heather

    £32.00
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  20. Calvin Klein Core Unlined Bralette 2 Pack Bra - Black https://internetfusion.imgix.net/1222450.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Unlined Bralette 2 Pack Bra - Black

    £32.00
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  21. Calvin Klein Core 3 Pack Womens Thong - Black https://internetfusion.imgix.net/1258293.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core 3 Pack Womens Thong - Black

    £38.00
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  22. Calvin Klein Core Unlined Triangle Womens Bra - Grey Heather https://internetfusion.imgix.net/1129163.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Unlined Triangle Womens Bra - Grey Heather

    £30.00
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  23. Calvin Klein Core Lightly Lined Demi Womens Bra - Black https://internetfusion.imgix.net/1172885.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Lightly Lined Demi Womens Bra - Black

    £34.00
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  24. Calvin Klein Core Triangle Bra - Grey Heather https://internetfusion.imgix.net/1273949.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Triangle Bra - Grey Heather

    £36.00
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  25. Calvin Klein Core 3 Pack Hip Mens Brief - Xwb Black W. Black Wb https://internetfusion.imgix.net/1447534.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core 3 Pack Hip Mens Brief - Xwb Black W. Black Wb

    £35.45 £37.00
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  26. sale Calvin Klein Intense Power Classic Bikini Bottoms - Beetroot Purple https://internetfusion.imgix.net/998493.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Intense Power Classic Bikini Bottoms - Beetroot Purple

    £20.95 £38.00 (Save 45%)
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  27. Calvin Klein Core Unlined Bralette Bra - Cherry Blossom https://internetfusion.imgix.net/1286745.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Unlined Bralette Bra - Cherry Blossom

    £23.95 £30.00 (Save 20%)
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  28. Calvin Klein Core Modern Cotton T-Shirt Bra - Black https://internetfusion.imgix.net/1256640.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Modern Cotton T-Shirt Bra - Black

    £41.00
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  29. Calvin Klein Core 3 Pack Mens Boxer Shorts - Multicoloured https://internetfusion.imgix.net/1258233.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core 3 Pack Mens Boxer Shorts - Multicoloured

    £40.00
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  30. Calvin Klein Core Cotton Stretch Pack of 3 Mens Boxer Shorts - White https://internetfusion.imgix.net/561359.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Cotton Stretch Pack of 3 Mens Boxer Shorts - White

    £40.00
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  31. Calvin Klein Core Cotton Stretch Pack of 3 Mens Boxer Shorts - Black https://internetfusion.imgix.net/561393.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Cotton Stretch Pack of 3 Mens Boxer Shorts - Black

    £40.00
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  32. sale Calvin Klein Classic Retro Bikini Bottoms - Deep Ultramarine https://internetfusion.imgix.net/994614.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Classic Retro Bikini Bottoms - Deep Ultramarine

    £15.45 £30.00 (Save 49%)
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  33. Calvin Klein Core 3 Pack Hip Mens Brief - Black White Grey Heather https://internetfusion.imgix.net/1258904.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core 3 Pack Hip Mens Brief - Black White Grey Heather

    £37.00
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  34. sale Calvin Klein Intense Power Classic Bikini Bottoms - Pvh Black https://internetfusion.imgix.net/966903.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Intense Power Classic Bikini Bottoms - Pvh Black

    £20.95 £38.00 (Save 45%)
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  35. Calvin Klein Core Carousel 3 Pack Bikini Knickers - Black https://internetfusion.imgix.net/1258251.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Carousel 3 Pack Bikini Knickers - Black

    £38.00
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  36. Calvin Klein Core Modern Cotton Bralette Bra - Black https://internetfusion.imgix.net/1253791.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Modern Cotton Bralette Bra - Black

    £30.00
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  37. sale Calvin Klein Cut Out Bralette Womens Bikini Top - Safety Yellow https://internetfusion.imgix.net/1158789.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Cut Out Bralette Womens Bikini Top - Safety Yellow

    £25.95 £46.00 (Save 44%)
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  38. Calvin Klein 2-Pack Bikini Girls Knickers - 908 White/black https://internetfusion.imgix.net/1439993.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein 2-Pack Bikini Girls Knickers - 908 White/black

    £17.95 £22.00 (Save 18%)
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  39. Calvin Klein Core Carousel 3 Pack Bikini Knickers - Black/white/grey Heather https://internetfusion.imgix.net/1258264.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Carousel 3 Pack Bikini Knickers - Black/white/grey Heather

    £38.00
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  40. sale Calvin Klein 2-Pack Bikini Girls Knickers - 037 1 Black / 1 Unique https://internetfusion.imgix.net/1439992.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein 2-Pack Bikini Girls Knickers - 037 1 Black / 1 Unique

    £14.45 £22.00 (Save 34%)
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  41. Calvin Klein Core Modern Cotton Plus Size Bra - Black https://internetfusion.imgix.net/1254076.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Modern Cotton Plus Size Bra - Black

    £23.95 £30.00 (Save 20%)
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  42. Calvin Klein Core 3 Pack Mens Boxer Shorts - Black / White / Grey Heather https://internetfusion.imgix.net/1258542.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core 3 Pack Mens Boxer Shorts - Black / White / Grey Heather

    £40.00
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  43. Calvin Klein Core Cotton Stretch 3 Pack Low Rise Trunk Mens Boxer Shorts - Black White Grey Heather https://internetfusion.imgix.net/1288690.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Cotton Stretch 3 Pack Low Rise Trunk Mens Boxer Shorts - Black White Grey Heather

    £31.95 £40.00 (Save 20%)
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  44. sale Calvin Klein 2-Pack Trunk Boys Boxer Shorts - 926 White/grey Htr https://internetfusion.imgix.net/1439997.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein 2-Pack Trunk Boys Boxer Shorts - 926 White/grey Htr

    £15.45 £24.00 (Save 36%)
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  45. sale Calvin Klein Cheeky String Side Tie Bikini Bottoms - Flamingo https://internetfusion.imgix.net/997289.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Cheeky String Side Tie Bikini Bottoms - Flamingo

    £17.95 £32.00 (Save 44%)
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  46. sale Calvin Klein Apron One Piece Retro Swimsuit - Pvh Black https://internetfusion.imgix.net/994596.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Apron One Piece Retro Swimsuit - Pvh Black

    £38.95 £70.00 (Save 44%)
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  47. Calvin Klein Core High Leg Tanga Womens Thong - Black https://internetfusion.imgix.net/1273943.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core High Leg Tanga Womens Thong - Black

    £20.00
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  48. sale Calvin Klein Bandeau Pop Garden Bikini Top - Pop Garden Mandarin Red https://internetfusion.imgix.net/1001207.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Bandeau Pop Garden Bikini Top - Pop Garden Mandarin Red

    £15.95 £50.00 (Save 68%)
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  49. sale Calvin Klein Light Lined Triangle Womens Bra - Grapefruit https://internetfusion.imgix.net/1162864.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Light Lined Triangle Womens Bra - Grapefruit

    £20.95 £36.00 (Save 42%)
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  50. sale Calvin Klein Fixed Triangle Bikini Top - Flamingo https://internetfusion.imgix.net/998497.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Fixed Triangle Bikini Top - Flamingo

    £21.95 £42.00 (Save 48%)
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  51. Calvin Klein 2-Pack Bralette Girls Bra - 908 White/black https://internetfusion.imgix.net/1445424.jpeg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein 2-Pack Bralette Girls Bra - 908 White/black

    £22.95 £28.00 (Save 18%)
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  52. sale Calvin Klein 2-Pack Bralette Girls Bra - 037 1 Black / 1 Unique https://internetfusion.imgix.net/1439994.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein 2-Pack Bralette Girls Bra - 037 1 Black / 1 Unique

    £18.95 £28.00 (Save 32%)
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  53. sale Calvin Klein High Rise Print Womens Bikini Bottoms - Core Digonal Logo https://internetfusion.imgix.net/1337717.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein High Rise Print Womens Bikini Bottoms - Core Digonal Logo

    £22.45 £42.00 (Save 47%)
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  54. sale Calvin Klein Core Unlined Bralette Bra - Black Red Gala Waistband https://internetfusion.imgix.net/1286632.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Unlined Bralette Bra - Black Red Gala Waistband

    £18.45 £30.00 (Save 39%)
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  55. Calvin Klein Core Printed Trunk Mens Boxer Shorts - Black https://internetfusion.imgix.net/1258301.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core Printed Trunk Mens Boxer Shorts - Black

    £15.95 £20.00 (Save 20%)
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  56. sale Calvin Klein Plunge Triangle Bikini Top - Golf Green https://internetfusion.imgix.net/994617.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Plunge Triangle Bikini Top - Golf Green

    £25.95 £46.00 (Save 44%)
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  57. sale Calvin Klein Intense Power Classic Bikini Bottoms - Flamingo https://internetfusion.imgix.net/836767.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Intense Power Classic Bikini Bottoms - Flamingo

    £20.95 £38.00 (Save 45%)
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  58. Calvin Klein Core 2 Pack Womens Thong - Grey Heather https://internetfusion.imgix.net/1142431.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Core 2 Pack Womens Thong - Grey Heather

    £24.00
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  59. sale Calvin Klein Bandeau Romper Womens Bikini Top - Phlox Pink https://internetfusion.imgix.net/939202.jpg?auto=format,compress&cs=srgb&fit=fill&fill=solid

    Calvin Klein

    Calvin Klein Bandeau Romper Womens Bikini Top - Phlox Pink

    £25.95 £54.95 (Save 53%)
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