Nothing will make you bonk like running through dehydration, so be sure to stay well oiled with the Salomon Advanced Skin S Lab Skin3 5 Hydration Pack Set. Salomon's form fitting, ergonomic, and chafe free Motion Fit technology keeps the Hydro 5 riding smoothly while you run. This vest style pack comes with two 17oz soft flasks with soft bite valves that sit in easy to reach chest pockets. Not only is it bounce free, but it's made with stretchy, breathable, and moisture wicking Elastic Power Mesh that conforms to your body and buckle free soft trims that reduce friction and chafing, making long runs that much better.The Twin Link sternum adjustment system eliminates pressure points and eases breathing, and a 4D pole holder makes it easy to stash your sticks once you've navigated the roughest terrain and are cruising down the home stretch. There's a bladder ready hydration sleeve, and a plethora of smaller stash pockets make carrying gels, gloves, a headlamp, and a wind jacket no big deal. Salomon is looking out for your safety, too, designing the Hydro 5 with reflective trim, a safety whistle, and an included space blanket to keep you warm if you wander off the trail and end up spending a night in the woods.