This unprecedented Tri Singlet utilizes 2XU's powerful 70D/Circular Knit fabric for increased power and durability to arm the athlete with greater power output plus increased blood flow to reduce lactic acid build-up. ICE X fabric is engineered for endurance events like no other. Xylitol is embedded in the fabric yarn to draw heat from the body and IR blocking inhibits penetration of infrared rays to lower skin temperature by up to 5.4 degrees farenheit. This garment will excel in all conditions, especially keeping you cool when it's hot outside. Features include front semi-lock zipper, rear storage pocket, chafe resistant flat lock stitching. The ultimate performance Triathlon Singlet.