SKINS TRI400 Women"s Compression Racer Back Top features dynamic gradient compression to help accelerate your blood flow to get more oxygen to your active muscles. Based on 400 key fitting points, the SKINS TRI400 range is cut for comfort while swimming, cycling and running. Strategically placed panels of TRI400 fabric on the front of the top minimize drag and aid performance in the water. Memory MX Fabric panels in the back of the top provide targeted gradient compression, while also allowing maximum lateral movement during the swim leg. Other features include an ultra soft lightweight shelf-bra gives support and protection during all stages. Strategically placed flatlock seams help to ensure reduced drag in the water, optimal compression, muscle wrapping and comfort.