These shorts are light, breathable and loose fit which makes them ideal for hard core training or comfortable enough for leisure. You absolutely most try these shorts. They are wonderful. Micro Fiber. Sizing: XS-50"-54" /waist 22"-27" Sm 54"-57" /waist 26"32" M- 5.6"-5.9" / waist 32"-36" Lg 5.10"-6.1" /waist 34-38" XL- 6.1"-6.4" /waist 35"-42" XXL- 6.2"-6.6" / waist 42"-46" 3XL- 6.2"-6.6" /waist 46"-52"