MECH-ENG Shorts -Material :80% Nylon 20% Polyester -Care Instructions: Machine Wash Size Chart US X-Small/Tag S Waist 26"-29" US Small/Tag M Waist 28"-32" US Medium/Tag L Waist 32"-36" US Large/Tag XL Waist 36"-40" Elastic design, indicated size are stretchable. Design - Light weight fabric for easy movement and keep you cool. - Drawstring in the elastic waistband,perfect fit for your waist. - Breathable mesh,good elastic nylon fabric,have very good shape body effect. - 360 degree stretch for unrestricted muscle movement. - High-quality material is more easy to clean, retains shape even after multiple washes. Suitable For Swimming, Running, Jogging, Gym, Workout, Fitness, etc. You decide what will be best for you! We're responsible for every customer of us. Any question or doubt you have, please contact us. We will do what we can to make you satisfied. Our policy on resend and refund is very thoughtful and reasonable. If you're not satisfied, you can return at any time. You will surely be happy with the whole shopping!