95% Modal, 5% Spandex, offer smooth and against-the-skin contact. Lightweight and breathable keeps you cool and dry, crotch gusset inseam prevents bunching for optimal comfort and everyday wear. Do not pilling and fading, so underwear will look and feel new, wash after wash. Moisture-wicking fabric draws perspiration away from the body and towards the surface where it can evaporate. Size Chart: Size Small=US S=Label XL, Size Medium=US M=Label 2XL, Size Large=US L=Label 3XL, Size Large=US XL=Label 4XL. (The size of the label is Asian Size, we have changed to the US Size, so the size of the label received is THREE SIZES larger than the size of the order.) GEEK LIGHTING Men's 4 Pack Boxer Briefs for optimal comfort and everyday wear. * Stretch modal cotton fabrication provides a snug, trim fit. * Gusset inseam ensures a smooth, better overall fit. * Contour pouch offers support and keeps you in place. * Ultra Dry moisture-wicking fabric provides cool, all-day comfort. 95% Modal, 5% Spandex Classic boxer brief style Elastic waistband Exposed Widen Waistband Provide more comfortable feelings for you, fit your waist well, nor too loose or too tight. Neat & Reinforced Stitches on Legs Perfect fit while preventing unwanted skin contact, provide for ultimate comfort and unrestricted mobility. Flatlocked Stitching & Construction Seams Prevent chafing and any skin irritation, fit for men at home or work or outdoor sports activities. Second-skin Feeling Made from natural modal fiber, which is better breathable, stretchy and softer than cotton. Attention: please note that you should place your order in US size, however the tags inside the items will show in Asian size. US Size - - Tags Size - -Waist Small - - - - XL - - - - 27.5-31.5 inches Medium - - 2XL - - - 31.5-35.4 inches Large - - - - 3XL - - - 35.4-39.4 inches X-Large - - - 4XL - - - 39.4-42 inches Washing Tips: Hand wash those boxer briefs separately in water under 100º F is recommended. Do not use bleach, avoid blending with other clothes of dark colors or soaking for a long time.