An adjustable, custom fit system, with a breathable backpanel and body -hugging 3D waistbelt, making achieving comfort and stability a snap on the trail. - VersaFit adjustable torso length with perforated 3D foam breathable backpanelPadded wraparound hipbelt with large zippered pocketsPerforated, breathable shoulder harness with sternum strap featuring an integrated safety whistleWishbone alloy frame for stable load management and torsional flexibilityZippered bottom sleeping bag compartmentZippered top pocket with underside zippered pocket and key clipDual-side durable mesh pockets with top and bottom compression strapsFront oversized stretch mesh pocket with durable fabric panelQuick-pull drawcord closure and top webbing compression