The Salomon Mens Advanced Skin 12 Set Running Vest comfortably carries your essentials and is a must-have for long-distance trail runners. Made with durable (88% Nylon, 12% Elastane) fabric to comfortably and securely hold your essential gear. Includes two 500 ml / 17 oz. Salomon Soft Flasks. Flexible sternum strap construction provides a comfortable fit for men and women. Sensifit construction gives a snug, precise fit while balancing your load front and back, letting you move freely and comfortably. 2 holster pockets on shoulder straps carry soft flasks. 2 large dump pockets on outside of holsters for gels, nutrition, and apparel. Small pouch in right holster pocket for gels and electrolyte caps. 2 front zipper pockets for your phone or gels. Lower rear through pocket for lightweight apparel, gloves, and a headlamp. Upper rear stash pocket for larger apparel and essential gear. Internal mesh pouch with a key clip and room for small valuables. Large rear expandable zipper pocket for apparel, gloves, nutrition, and more. Insulated sleeve for optional Salomon Hydrapak Soft Bladder 1.5L (not included). 4D pole holder holds your trekking poles to keep your hands free when the terrain allows for it. Safety whistle within left shoulder strap pocket. Reflective detailing on all sides for added safety. Weight: 302 g / 10.65 oz. Sizing (Chest): XS: 32-35”, S: 34.5-38”, M: 37.5-40", L: 39.5-42.5", XL: 42-45".