The Linssen Wakesurf neoprene impact vest is built for performance riders who want a clean, low-profile fit. Quick-drying, waterproof fabric and a lightweight design keep it out of your way while you ride. Features Quick-dry, waterproof neoprene keeps you light and comfortable on the water. Heavy-duty zipper for a secure, no-slip fit. Tight fit recommended. The vest will feel extremely tight when dry, but neoprene loosens up once it gets wet. A snug, hard-to-zip dry fit is exactly what you want. Not Coast Guard approved. How to measure Chest: Measure straight across the front, one inch below the armhole. Length: Measure from the highest point of the shoulder straight down to the bottom hem. Since it loosens up once wet, size to a snug, tight dry fit rather than sizing up for comfort. Size chart Size Chest (inches) Length (inches) XS 28 21.5 S 31 23 M 34 24.5 L 38 25.5 XL 41 26 2XL 44 26.5