Designed specifically to comfortably fit female backpackers, the Orbit 15 is an easy loading, panel access pack ready for a day on the trail. Our light, supportive Agile suspension system offers excellent ventilation and ample padding to keep you going all day long. All Kelty Agile series packs feature the Agile suspension system; a lightweight,butterfly-shaped aluminum stay that transfers weight directly to the hips while allowing the pack to move with the wearer. A spring-loaded backpanel with molded lumbar and scapula pads adds support and multi-directional airflow for added comfort. Other packs at a similar price and capacity typically use heavier steel frames or no frame at all.