The RonHill Men's Advance Twin Running Shorts fetaure a stretch woven outer with a supportive inner short. The outer short is made of lightweight Flexlite fabric for breathability and stretch, it also features a water repellent treatment to protect you from the elements. Powerlite fabric inner shorts provide excellent support, stretch and recovery, while the wicking properties help you stay dry and comfortable. Additional features include a back zip security pocket, reflective graphics and a bonidex waistband with adjustable drawcord. - A.D. Outershort: Flexlite fabric Lightweight and breathable with enhanced stretch Water repellent treatment Back zip security pocket – ideal for gel and MP3 player Laser cut panels Reflective graphics Bonidex waistband with draw cord Inner short: Powerlite fabric High content of elastane provides excellent support with great stretch and recovery Wicking treatment for excellent moisture management No side seams for extra comfort