They need to be light and stretchy to let you move, and have a liner to keep you cool and dry.Features:- Ultra-light, stretch-woven outer fabric for totally unrestricted movement- Built-in HeatGear® compression shorts for added coverage & support- 4-way stretch material moves better in every direction- Mesh panels for added breathability- Mid-rise encased elastic waistband with internal drawcord- Secure, zip back pocket for storing energy gels, keys, or other small essentials- Odor control technology minimizes odor- Reflective logo- Fitted: Streamlined fit that's not too tight or too loose.Specifications:- Outer Shorts: 88% Polyester/12% Elastane- Liner Shorts: 77% Polyester/23% Elastane