The Thule Guidepost Medium Hip-Belt is designed to attach to Thule's Guidepost technical backpacking packs. Fits a hip size from 79-94 cm or 31-37 inches in circumference. When carrying large loads over long distances, it's much less tiring to carry the weight on your hips than your shoulders. In fact, approximately 80% of a backpack's load should be supported by your hips. So it's really important to find a hip-belt that fits properly. Compatible with Thule Guidepost Backpacking packs. Mens specific fit. Material: Nylon.