Waxed Duck Canvas with Red Wing Leather August 2026 Updates: MOLLE webbing on the shoulder straps and a brand new full-grain leather stars and stripes Spearhead patch. GR1, the best rucksack ever built, meets time proven heavy canvas and construction. Heritage means it&';s proven by our grandfathers, and our grandfather&';s grandfathers. And that it will last the test of time for those generations who come after us. For materials, we chose the strongest possible duck canvas with a waxing process proven over the last 170 years, giving the Heritage a retro canvas rucksack look with the durability you&';d expect from a GR1.