The men's Osprey BioForm4 custom moldable hipbelt lets you personalize your Osprey pack with a heat-moldable design that delivers optimal fit, comfort and performance.

• Providing superior load support, this BioForm split wing hipbelt is a thermoformed, laminated closed-cell foam with an outer supportive shell
• The foam technology in BioForm hipbelts allows heat-molding for a custom fit
• Osprey's certified Custom Molding available in most stores—check your local REI store for a custom hipbelt molding oven
• ErgoPull hipbelt closure provides extra leverage in cinching, drawing tension along top and bottom, not through the center, relieving hipbone pressure
• X-large fits hips greater than 36 in.; large fits hips 33-37 in.; medium fits hips 30-34 in.; small fits hips 27-31 in.