The Salomon Trail 10 Set Backpack provides the lightweight functionality needed for spirited trail runs and everyday errands. Channeling cool, outside air over your back and shoulders, the perforated back panel and 3D Airmesh shoulder straps keep you comfortable when you're running full blast down your favorite trail. Its hanging reservoir pocket bladder sold separately helps you stay hydrated when you're exercising hard, and the zippered main compartment stashes a lightweight base layer when you're on the trail or a flannel when you're headed to an outdoor concert. EVA padding in the strategic areas adds cushioning where you need it most. In addition, reflective hits keep you visible when you exercise in the early morning or late evening hours.