Pearl iZUMi Women's Select Sleeveless Triathalon Tri Jersey Fall/Winter 2010 SELECT Transfer Direct-Vent integrated mesh panels for fast trying, optimum temperature regulation Semi-Form Fit,  zip for venting , 100% Micro Polyester, Mesh: 100% Polyester Flatlock seams for a chafe-free fit Newly designed back pocket gives a place to securely stash nutrition away