High-concerned chemical: none Craft of Weaving: Knit Model Number: B1191 Pattern Type: Solid Material: Nylon,Elastane Brand Name: brave person Origin: Mainland China CN: Guangdong Gender: Men Briefs & Boxers: BRIEFS Please read before buying We guarantee it's genuine product and high quality Fabric material: 80%+Nylon 20%Spandex Each pcs with the original packing. Please take a look of the detailed size data. Thank you! This is Asian size,don't simply choose it by S/M/L/XL If you are not sure the size is right for you, you can find out your usually wear underwear. You measure the tile waist (1/2 waist) of the underwear in the non-stretched state. Size S: 32 cm, Size M: 34 cm, Size L: 36 cm, Size XL: 38 cm All measurement in cm, please note 1 cm = 0.39 inch,1 inch=2.54 cm Measurements chart(Please allow 1-2 cm as the error range for manual measure)