Zero RH + Crit Backpack The Crit Backpack offers plenty of compartmentalized storage w/o compromising a comfortable fit while you're en route. Zero RH+ also had the foresight to include three highly visible reflective panels on the rearward-facing bits of the pack to ensure a high degree of visibility. The Zero RH+ Crit Backpack features four compression straps to minimize the pack's profile, & a built-in waist strap to better balance the load on your back. Smoke free home. 12x17x5