Underwear material ------ 95% polyester, light and comfortable; 5% spandex can maintain the breathability and elasticity of the men's boxer briefs. Size and Precautions -------- S / M / L / XL / 2XL. Please see our size chart for the best fit. If you are between sizes, or prefer a looser fit, we recommend ordering one size up. Do not wash in hot water and do not use a high temperature dryer. Occasion: Men's briefs with pockets are perfect for workout, running, skiing, skateboarding, football, baseball, basketball, tennis, volleyball, soccer, hiking, sports, office, party and daily wear. Perfect gift: Our stylishly designed no-up-leg design boxer briefs are made of high-quality polyester, which is durable and will bring you ultimate comfort. These briefs are perfect as a unique Birthday, Valentine's Day, Anniversary or Christmas gift for your family or loved ones. Washing Tips and Service: Men's underwear is machine washable or hand washable, do not bleach, tumble dry low. If you have any problems with your order, please contact us and we will help you out.