Hydration packs, generally speaking ... which is particularly light when you consider that it’s still reservoir-compatible.

Whether you’re training for a marathon, tackling your first ultra, or heading for a day out on the trails, a hydration pack can help you carry all the essentials you need in one place.

When you buy through our links, we may earn a commission. Learn more› By Jenni Gritters A hydration pack—that is, a backpack with a built-in water reservoir—makes it easier to stay hydrated ...

Although you could stow your gear in any old pack, hiking backpacks are specifically designed for hiking and as such, have ...