ANYTHING-PROOF RUCK GR0 "The Zero" is one of our original three rucks (previously known as the GR Echo). It retains the functionality of the GR1, including the bombproof laptop compartment, built for smaller frames. Crafted from a fabric initially designed for high-performance racing sails. X-PAC is lightweight, ultra-durable, and waterproof-key features needed to withstand the intense forces of the open ocean. Tested in Central American rainforests and the deserts of New Mexico, this rucksack protects your gear from water, sand, dust, and whatever else gets in your way, and comes with our Scars Lifetime Guarantee.