Based on 400 key fitting points, this SKINS TRI400 Men's Compression Tri-Suit is cut for comfort while swimming, cycling & running. Dynamic gradient compression helps accelerate your blood flow to get more oxygen to your active muscles. Flatlock seams ensure reduced drag in the water, optimal compression, fit, muscle wrapping & comfort. Swim: Panels of strategically placed TRI400 fabric minimize drag & aid performance in the water. Bike: The ultra-lightweight TRI400 Elastic Interface® Technology chamois is designed specifically for triathletes looking for maximum comfort & performance. Run: Strategically placed carbon-infused fabric panels between the thighs mean less chafing, more comfort & a better performance during the final stage of the race. Other features include semi auto lock front zipper for temperature control, lined zippers & zipper guards for comfort, & two pockets with bonded flaps to eliminate drag in the water.