Ultraspire Kinetic Race Vest (Small/Medium) - Red Soft, fully breathable, lite weight mesh hip support featuring bio designed optimum efficiency. Lite weight adjustable Speed Hook attachment. Large hole microfiber mesh for ultra breathability Low profiled dimensional zippered pouch on each side of waist piece that does not impede natural arm movement. Quick stash right pocket is large enough to hold a spare bottle or other essentials and it uniformly compresses with cord Patent pending Magnon Electrolyte Pocket with easy worry free magnet closure. Light weight zippers pulls easily grabbed even with gloves, cold or numb fingers Ergo aligned and angled bottle holsters allow for ease of access; plus, patent pending Polarity System aids in return of bottles to proper position and aids in stability Comes standard with two Human 26 oz finger loop bottles. WEIGHT: 380 g (600 g with bottles). SIZING: S/M - Torso Length (16"-20"), Chest (28"-44"), Waist (26"-40"). L/XL - Torso Length (20"-24"), Chest (32"-50"), Waist (30"-42")