CHECK THE SIZE CHART (in the image section above) The sleeveless Rocket warm water wetsuit ensures balanced buoyancy a great choice for those that enjoy the freedom of a sleeveless wetsuit. Key Features of sailfish Rocket Wetsuit SCS 39-NeopreneThe durable and smooth, surface coated neoprene allows for excellent buoyancy and low frictional resistance in water. NEW Comfort CollarA perfect snug fit and a lower collar that improves comfort. Soft Stretch Inner LinerA flexible inner material that ensures exceptional wearer comfort and reduced power loss in the shoulder and arm area. Ergo Fit Cut DesignA panel pattern, ergonomically adjusted in the groin, leg and hip areas, ensures that the neoprene fits perfectly. Stability Hip PanelThe smaller version of the extra stability hip panel. A Hip panel with durable inner material for more hip stability. MaterialMaterial thickness Chest: 5,0 mmMaterial thickness Hip: 5,0 mmMaterial thickness Thigh: 3,0 - 4,0 mmMaterial thickness Lower Leg: 2,0 - 4,0 mm SizingThe wetsuit size is determined using body weight and body height. If you appear to be in-between sizes, the body weight is the more relevant factor.