Place the pack in front of you with the shoulder straps side up. Open the Velcro strap and remove it from the webbing loops. Now thread the strap through the best 2-3 webbing loops to fit your height. Taller hikers will use the top three webbing loops, shorter hikers need the loops closer to the bottom – look for the capital M or L to find these loops. Reattach the strap and try the pack on to check the fit.