Topo Designs Designs Mountain Hydro Sling

What Our Gearhead® Experts Are Saying:"The Mountain Hydro Sling is the bag I grab when I want to move light without leaving anything behind. The dedicated bottle sleeve holds my 32oz Nalgene securely, and the zippered back pocket is perfect for keeping my phone and wallet separate from everything else. I've worn it on short trail walks and city errands alike, and it never gets in the way."Throw-on-and-go days call for a bag that matches the pace. The Topo Designs Mountain Hydro Sling is built for exactly that — the kind of outing where a full pack feels like overkill but a stuffed pocket just won't cut it. Whether a morning trail walk or an afternoon of errands bleeds into an unplanned adventure, this compact crossbody keeps everything organized and within arm's reach. The 1. 7-liter body punches above its size with a front mesh sleeve that holds a water bottle up to 32oz, a zippered back pocket for valuables, and a drawcord cinch closure that keeps the main compartment secure on the move. The adjustable, removable shoulder strap fine-tunes the fit for any body type or layering setup, and the detachable velcro bike attachment loops mean it transitions just as naturally to two wheels as it does to two feet. Made from 200D recycled nylon throughout, the Mountain Hydro Sling carries Topo Designs' signature durability in a package that weighs next to nothing.