Unique feature: 2/3 length aluminum stay * IsoForm Harness: Spacer mesh surface with no sewn seams, hook and loop adjustable yoke allows 4"/10cm of fine torso adjustment * Lightweight Alloy Peripheral Frame Suspension: Ribbed foam backpanel with grip mesh and recycled HDPE framesheet with weight reducing cutouts * IsoForm CM Hipbelt: Heat moldable foam (using Osprey CM in-store hipbelt ovens) with ErgoPull hipbelt closure * Volume: 4200cu in/70L Weight: 5lbs/2.27kg