99extra Underwear, 2 Color Men's Skinny Low Rise Milk Silk Boxer Briefs 95% Milk Silk / 5% Spandex Asian Size,chose a larger size than you normaly take, careful read size info in "products description" befor order 95% milk silk and 5% spandex, very soft, breathable and stretch Special "U" Design of "CUA" underwear, can stretch the scrotum fully, ventilation cooling, and lower genital's body temperature 1-2 C, to keep it more healthly Suitable for cold water hand washing, do not bleach, do not iron, do not wrest dry, pay attention to choose the low speed level for machine washing and dehydration The Doctor advised, a underwear don't use more than 6 months, it will be very dirty although you often wash it