Biking shorts provide comfort during long and short bike rides. Bicycling shorts are designed specifically for the needs of a cyclist. These needs include padding in the right places, strategically placed seams,tight fitting,flexible materials like spandex that reduce air resistance and allow a full range of motion on the bike,and the right amount of breathability and wind block.Sponeed cycling shorts have all these important features, aim to provide efficient and comfortable riding trip for cycling enthusiasts. 1, Matreial is 80% polyester and 20% spandex, high flexibility,breathable,moisture absorption and quick dry. 2, High tech gel pad with anatomical shape,provided with central groove,reducing the body pressure onto the saddle and granting maximum comfort and best fitting. 3, Flactlock seams for extra comfort next to skin,avoid the discomfort caused by friction while riding. 4, Elastic silicone band gripper on the bottom leg keep your shorts in place without creating an overly compressive”sausage leg” effect. Size chart for reference,please reference your height weight and waist,if you have any doubt send message to us before purchase: US Small: Height: 5'3"-5'6", Weight: 110-135 lbs, Waist:28"-30"; US Medium: Height: 5'5"-5'9", Weight: 130-160lbs, Waist:31"-33.5"; US Large: Height: 5'9"-6', Weight: 160-180lbs, Waist:33.5"-35"; US X-Large: Height: 5'11"-6'2", Weight: 175-190lbs, Waist:35.5"-38"; US XX-Large:Height: 6'2"-6'4", Weight: 190-220lbs, Waist:38.5"-41"; US XXX-Large: Height: 6'3"-6'5", Weight: 195-245lbs, Waist:39"-42.5"