Thule Guidepost Women's Backpacking Pack, 75-Liter When most lids double as a lumber pack, the Thule Guidepost lid transforms into a 24L summit backpack offering 2 packs in 1 Pivoting hipbelt allows the user to walk more naturally to improve balance and reduce muscle fatigue The Thule Guidepost is made from 210D Dobby Cordura & 420D nylon The QuickFit shoulder yoke allows the user to rapidly adjust the shoulder strap width up to 30 mm to maximize comfort on the trail TransHub suspension system is made of a single 6061 aluminum stay connected to spring steel wire in the hipbelt ensuring load transfer