20 Liter Weatherproof Rucksack The Sanction is a compact weatherproof rucksack designed to hold the daily essentials. Built to last a lifetime with waterproof fabrics and military spec. construction. The Sanction also features multiple weatherproof compartments, urethane coated zippers, waterproof materials, and an internal frame sheet. Large zippered pocket fits most 15'' laptop computers and larger tablets. Made in the USA with a lifetime warranty.