Seamless Microfiber Back Mesh Boxer, WOW! Sexy and comfortable microfiber fabric. See through mesh panel across the back and side of the boxer. High end microfiber fabric 93% Polyamide 7% Spandex stretch to fit. Mesh fabric is see through (be careful, as with all mesh microfiber the fabric mesh may tear if he pulls his fingers through it). By NDS WEAR (TM) Two sizes, Small/Medium fits 27" through 32", Large/XL fits 33" through 38"