Perfect for a day hike or ride, these packs feature the BioSync Technology system, which offers internal, on-the-fly compression to keep the pack constricted and snug against your back as you empty the reservoir or remove items from inside. Packs have a set of flexible tendons that attach the shoulder harness and waistbelt to the pack body, allowing pack and suspension to move with the body while in motion. Moisture-wicking harness and waistbelt ensure you stay dry. Aero-mesh backpanel, adjustable sternum strap, hydration port and sleeve with back-fill access, tube management system, and mesh side pockets. Also includes webbing loop for securing bicycle light, haul loop, or reflector. Fleece-lined media pocket keeps smaller items within easy reach. 18 liters. 16" - 22" torso.