Ribbed panels at the sides and under the arms for added mobility Front pockets with an interior media pocket Thumbholes help keep sleeves down and hands warm Elastic zipper pull doubles as an emergency hair tie Rarely worn Mesh: 89% Nylon, 11% Elastane Rib: 97% Cotton, 3% Elastane Pockets: 95% Cotton, 5% Elastane Body: 70% Cotton, 30% Polyester