The Thule Guidepost Medium Hip-belt is designed to attach to Guidepost technical backpacking packs. Fits a hip size from 87-125 cm or 35-50 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. Womens specific fit. Material: Nylon.