Most everything Ronix sells is conceptualized by the Big 3 – Reps, Riders, and Retailers. The engineers at Ronix have been thinking of their ultimate aquatic dream machine for years now. So, Ronix bought a Robot and had it craft a vest with roughly 3 times the amount of segments of a traditional impact jacket for the ultimate in mobility. Stitching with 39 precision individual flex segments. They then worked with a leading textile supplier on a new fabric that takes soft to the touch to a new level, introducing Silk Skin. The least abrasive material to ever be used in the life vest world. Extra smooth to the touch – and extra repellant to water. SIZE CHEST SIZE (IN) CHEST SIZE (CM) X-Small 28-31 71-79 Small 31-34 79-86 Medium 34-37 87-93 Large 37-40 93-102 X-Large 40-43 102-109 2X-Large 43-45 109-114