The perimeter of the pouch and the back side are made of transparent and breathable mesh fabric, Air mesh fabric, which has good air permeability, so that the lower body can be kept fresh at any time. The three-dimensional tailoring of the pouch emphasizes your super big stuff. The boxer that is easy to wear all the time. The waistband and mesh fabric are all made of white, which makes the bright colors more prominent, refreshing and sporty design. Like unworn, light and comfortable. Smooth × Meticulous with new skin touch feeling. More excellent elasticity, better gloss display, GX3ULTRA SKIN collection. Finest fabric : Polyester 92 % Polyurethane 8 %. Made in China Size Chart S size 25-28 cm M size 27-30 cm L size 29-32 cm XL size 31-34 cm XXL size 33-36 cm The size chart is based on Asian people size; it must be small for Western people. Please be care to order. Waist size: Put flat underwear then measure waist elastic width.