Free Shipping When You Buy 3 or more

Free Shipping When You Buy 3 or more

ISLAY Boxer Briefs – Open front fly

Crafted from Sea Island Cotton; the world's most precious cotton and loved by the British royal family.

ISLAY Boxer briefs are made from 100% American Sea Island Cotton with ultra-long fibers for a soft as cashmere feel and silky luster.  Smooth and light, with breathable comfort.

*Made with pride in Japan

Size Guide

Model wears a M (height 6'/ 182cm, weight 75kg)
Model wears a L (height 6'3"/ 190cm, weight 85kg)

*Our size chart follows Japanese standard sizing.

Height (cm) 155-165 165-175 175-190 FREE
Weight (kg) 50-65 55-75 70-90 85-110
Waist (cm) 64-74 74-84 84-94 94-104
Hip (cm) 78-90 84-96 90-102 96-108


Free Shipping When You Buy 3 or more
Free Size Exchanges

16 items left

  • American Sea Island Cotton

    American Sea Island Cotton, known worldwide as the “Prince of Cotton”, consists of extra-long cotton fibers and originates directly and completely from the Sea Island Cotton grown in the West Indies.

    Learn More

  • Waist

    The elasticized waistband is covered in smooth, soft cotton fabric that won’t dig into your skin and is comfortable to wear, even for those with sensitive skin.

  • Premium Fabric

    Plusher than others, our boxer briefs are durable and will never sheer. Our premium fabric boasts excellent absorbency and moisture-wicking properties.


  • Underwear Measurements

    We recommend comparing this product measurements to your favorite underwear.


    A(cm/in): S29/11.4, M31.5/12.4, L33/13, XL35.5/14

    B(cm/in): S28.5/11.2, M30/11.8, L32.5/12.8, XL33.5/13.2

    C(cm/in): S20/7.9, M22/8.7, L23.5/9.3, XL25.5/10


    *In general, US standard sizes are one size bigger than Japanese. European sizes are equivalent to the Japanese.