Big Agnes daypacks are built for extended day hikes, lightweight excursions, and everyday use. The Impassable 18L pack includes comfort features from top to bottom with a compression molded back panel, contoured shoulder straps, and a foam padded hip belt. Streamlined for exploring in comfort using ultralight sustainable materials with technical features from top to bottom, the Impassable 20L top-loading pack has plenty of everyday storage options that wont weigh you down.