WINDAY Men's Sexy Underwear Thong G-String Elastic Smooth Bikini Airplane Underwear Package Contents:1*Briefs Material--Ice Silk ; Material--Nylon Clearing mite antibacterial effect, good affinity to skin, breathable moisture, not out of shape Asia size M:= US S Asia size L: = US M Asia size XL: = US L Asia size XXL: = US XL