RIDE WITH A TECHNOLOGY ADVANTAGE. Whether you are riding a horse, bike, or motorcycle, your sit bones will make themselves known! We offer a solution using innovative impact protection technology to create slim-profile sport underwear allowing you to ride comfortably all day. Our strategically placed technology boasts a thickness of less than a stack of two quarters. You'll know you have them on, but no one else will!! And, your sit bones will thank you. FIT: The right fit is very important. To choose your size, use your jean size and/or your belt size. If you are in-between sizes on our size chart, choose the smaller size. Pony Tail underwear is made to hug the body for a snug fit; you don't want the fit to be too loose. M: Waist: 29" - 32" L: Waist: 33" - 36 XL: Waist: 37" - 40"