Eastbay 4" Running Shorts - Men's Start setting personal records in the Eastbay 4" Running Short. This short has mesh insets for great breathability, and EVAPORô inside liner to wick away moisture to keep you fresh during your run. The V-notch side leg opening, and inner drawcord provides a great fit and feel. Body and yoke: 100% polyester tricot mesh. Lining: 100% polyester. Imported.