Step out the door and onto the trail with everything you need for a long walk in the woods tucked into the Osprey Packs Manta AG 20 Hydration Pack. The smallest in the Manta series, it still provides the full set of features, just in a lighter, more compact design. Women-specific shoulder straps, hip-belt, and torso sizing provide a precise fit and enduring comfort, while plentiful pockets and organizing features keep everything tidy and conveniently accessible. It also includes a 2. 5 liter reservoir to handle your hydration needs on long treks, and its Anti-Gravity suspension system supports and stabilizes your load so you barely even notice you're wearing a pack. The Anti-Gravity suspension system uses a combination of different design elements--a LightWire frame, mesh back panel, BioStretch shoulder harness, and AG hip belt--to distribute weight, enhance breathability, and achieve a comfortable fit, no matter how far you roam. The included reservoir also has a hose with a magnetic sternum strap bite valve so you can take quick sips on the go. The main compartment offers room for an extra layer, lunch, and other trail accessories, and dual upper and lower compression straps help you keep your load compact. A helmet attachment loop lets you hook up your brain bucket when you go on climbing or biking missions, and the integrated rain cover can be easily deployed when an unexpected storm rolls in.