Review on Stay Hydrated & Comfortable with Salomon Active Skin 4 Set Running Hydration Vest in X-Small, Ebony/Black by Bob Walters

I was arguing between this and 5 because I was afraid it wouldn't have enough room. The photos do not show the full amount of memory this pack has. When it's empty I don't feel it move or flap in the wind at all thanks to the bungee cords. I'm sure there's enough room for two bottles, my phone, keys, some gels, some energy bars, a light jacket, a small first aid kit, a headlamp and maybe a smaller item or two at a time. I could easily walk 50 miles with this backpack without extra support! When ordering was told it would take a week for delivery, but it only took two days!