So Aromatherapy Men's Boxer Briefs Breathable Ice Silk Triangle Bikinis and Briefs Note:Asian size is smaller than US/EU/UK size so please check your measurements to make sure the item fits before ordering. Material--Ice Silk ; Material--Nylon Asia size M:= US S--Waist 25.6"-27.5" ; Asia size L: = US M--Waist 27.5"-29.5" ; Asia size XL: = US L--Waist 29"-32.5" ; Asia size XXL: = US XL--Waist 33"-38" ;