CHECK THE SIZE CHART (in the image section above) The Phantom wetsuit is a great choice for triathletes, with an intelligent transition system that wont slow you down as you move from one stage to another. Quick-release panels at the ankles are dead easy to use, and this works with an extended, reverse-pull zippers which also features a leash to make it easy to reach at all times. Elsewhere, you got full, effective protection from the effects of the suns harmful rays via full UV protection, and the Aqua-Flex collar keeps water out and helps prevent chafing in a sensitive area. Features: Bio-Stretch Zone: Strategically placed 1.5mm panels (under arms and lower back), 1mm panels (arm, shoulder and collar) Core Power System: Internal support system that improves posture, enhancing hip rotation and lengthening stroke 5mm Aqua Drive core body panel maximizes buoyancy and reduces drag thanks to Aerodome Neoprene Thermo-Guard technology on chest, shoulders and legs to retain body heat Quick-release ankle transition panels (horseshoe-cut design) for improved transition time Extended length, reverse-pull zipper with leash for easy on/off and quick transitions Aqua-Flex collar seal to keep water out and prevent chaffing and restriction Super stretch, SCS-Coated Yamamoto 40 Neoprene for ultimate flexibility 100% UV protection