Bestpriceam Men's Underwear Sexy Boxer Briefs Breathable Underpants (XL, Beige) 80% nylon Fabric: 80%Nylon + 20%Spandex, Lining: Modal Aisa size is smaller than US size(1~2 size). Professional Factory with High Quality Function: breathable, health care, anti emptied Bestpriceam is a registered trademark and the only authorized seller of bestpriceam branded products.