The Patagonia 20L Dirt Roamer Mountain Biking Pack is a streamlined pack for taking the twists and turns of long trails. Made with rugged 100% recycled nylon and built to endure a lifetime of demanding rides, the raised mono-mesh back panel boosts breathability while resisting water absorption, and highly breathable Regulator airmesh on the hip belt and shoulder straps to enhance airflow and comfort. The 2-liter HydraPak reservoir sits securely in a dedicated side-access sleeve for convenient hydration, and thoughtful details like an internal key clip and a top compression strap that helps stabilize the load or carry a helmet make this pack a reliable companion for every trail adventure.