50% cotton. 50% polypropylene. Technical fabric in Dryarn and cotton blend. Cooling and wicking fabric. Seamless for comfort and easy layering. Ribbed crew neck. Logo detail at the hem. A staple ROA style, the Seamless Shirt is constructed from a technical Dryarn and cotton blend with cooling and wicking properties and no seams for comfort and easy layering. It is detailed with ribbed trim at the crew neck and minimally branded with a ROA logo at the hem.