From the company that invented the swimskin, Blueseventy's PZ5TX is the fastest swimskin in our we've ever made. Drawing on years of race-proven testing and world championship winning design from the PZ3TX and PZ4TX, the PZ5TX incorporates Python technical fabric. This advanced, Italian precision-milled fabric gives the suit greater water repellency and compression than ever before, resulting in more speed, heightened control, and the confidence to swim aggressively from your first stroke through the final buoy.Swimskins are a thin, compressive fabric suit designed to maximize your speed when the water is too warm for a wetsuit. They do not provide buoyancy or warmth like a wetsuit.