The NEW Zoot ULTRA Swimskin uses the latest textile technology to maximize your performance in non-wetsuit swims. Zoot’s race legal ULTRA swimskin has been re-designed with years of testing on professional and amateur triathletes to make you more comfortable and faster in the water. KEY FEATURES: WATER REPELLANT - Italian stretch-woven fabric where every filament is treated with Lot’o’dry patented Durable Water Repellent (DWR) to reduce water absorption. This lightweight hydrophobic fabric has an ultra-low drag coefficient which allows you to glide through the water faster. MAXIMIZE PERFORMANCE - Most triathlon race suits are constructed of hydrophilic textiles, meaning they like water.Hydrophilic textiles move moisture off the skin to keep you cool and dry on the bike and run. The fabric is indeed treated during the early stages of the weaving process in such a way that every single filament receives the Lot'o'dry DWR. This leads you to have a very fast fabric in the water, a long lasting DWR performance (just to give you an idea, after 40 washes you still have the maximum of the performance) and a good breathability rate as it's not a mere coating applied on the surface of the fabric, blocking perspiration, yet it's applied on every single filamentWhen a race is non-wetsuit legal swimming in a swimskin will maximize your performance. Proven by competitive and Olympic swimmers, fabic is faster than skin. Take time off your next non wetsuit swim. MAZIMIZE MOBILITY – Legally, USAT and WTC (IRONMAN) rules allow the swimskins to come over the shoulders, but they must stay above the elbow.We have designed the Zoot ULTRA swimskin to be sleeveless to NOT implead your natural swim stroke and provide maximum shoulder mobility. Through our testing, the advantage of wearing a compressive hydrophobic textile over the shoulders does not outweigh the benefits of increased shoulder mobility that a sleeveless swimskin can provide. If you are wearing a Zoot sleeved racesuit under your swimskin, we recommend wearing the sleeves out as this will not hinder your performance and improve your T1 transition time. IMPROVED BODY POSITION – Compression is a key element in allowing a swimskin to work properly.Zoot’s ULTRA swimskin is designed to be compressive to support your muscles and improve body position in the water. Zoot’s innovative fabric contains 36% elastane for flexibility in lung expansion and exceptional breathing ability. QUICK TRANSITION – Easy on/off lanyard is attached to the highest quality YKK auto locking #3 zipper.The zipper is engineered to be reverse coil for low drag with a soft Yamamoto neoprene zipper guard to prevent chafing. NO SEW CONSTRUCTION - Ultrasonic bonded seams create a smooth surface to reduce drag and maximize speed.Advanced no sew construction also reduces chafing and provides for more flexibility and comfort. FIT TIPS: Swimskins are designed to be RACE FIT with integrated compression to maximize performance. We recommend buying the same size as your Zoot triathlon kit. It will feel tight at first but will relax once zipped up and in the water. 36% Elastane for flexibility and 64% Polyester for long lasting durability. sun UPF factor: 50+ WATER TEMPERATURE: IRONMAN (WTC) specifies a water temperature of 76.1F (24.5C) as the cutoff for wearing a wetsuit. USA Triathlon (USAT) specifies a water temperature of 78F (25.5C) as the cutoff for wearing a wetsuit. Approved for USAT and WTC (IRONMAN) sanctioned events.