Marmot

Kompressor Zest Hydration Backpack - 183cu in

That first pond you passed during your trail run looked pretty grimy, but after about ten miles without water, you might be thinking the next one looks pretty refreshing—it's a slippery slope to drinking giardia-infested water, but as long as you wear your Marmot Kompressor Zest Hydration Backpack, you should be alright.

This hydration pack/vest hybrid comes with a 2-liter reservoir and water bottle to keep you hydrated out there, and is made with a breathable mesh for a light, cool, and comfortable feel while you're on the move. The fit can be quickly adjusted via two chest and shoulder straps. And when evening runs and ultra races leave you running in low-light conditions, the reflective details and light clip attachment point will keep you visible to passing motorists and trail-side meese(or are they just called moose?).