Onyx MoveVent life vests are designed to tightly conform to your body while provideing excellent comfort, mobility, and cooling thanks to the ventilated mesh channels. The mesh lower back keeps the jacket from moving around and lets you comfortably sit in your kayak without hitting the seat. It is made with a 200 denier nylon outer shell and features adjustable side belts, a strong durable zipper, and shoulder adjustments with neoprene shoulder pads for comfort. The MoveVent Curve is available in yellow or blue colors, as well as three different sizes. Sizing information as well as Onyx part numbers are below: 122000-300-020-14 Yellow, 28 - 36" Chest, X-Small/Small 122000-300-040-14 Yellow, 36 - 44" Chest, Medium/Large 122000-300-060-14 Yellow, 44 - 56" Chest, X-Large/2X-Large 122000-500-020-16 Blue, 28 - 36" Chest, X-Small/Small 122000-500-040-16 Blue, 36 - 44" Chest, Medium/Large 122000-500-060-16 Blue, 44 - 56" Chest, X-Large/2X-Large This is a U.S. Coast Guard Approved Type III Life Jacket / Personal Flotation Device (PFD)