We use the best materials we could find: Super-tough 24 oz. waxed canvas from Scotland, old bull leather, marine-grade polyester thread(the kind used on ship sails), marine-grade stainless 316 steel, and copper rivets pounded by hand. Two side pockets of the canvas backpack with secure and quick access pad eye closure. Two tall front canvas pockets can be folded forward, or tucked behind the pocket for extra security. All four exterior pockets have hidden slot pockets behind them for extra storage. Interior canvas backpack panel pocket along the back can hold a tablet or small laptop. The Roomy, wide-open interior is big enough for a weekend in the mountains. The main flap has two pad eye closures with 3 adjustment slots. Thick old bull leather drawstring closure. Sewn leather tabs above each side pocket for lashing gear or clipping a carabiner. Hand-riveted old bull leather panel along the back and bottom for strength and structure. A sturdy old bull leather grab handle lays flat when the canvas backpack is not being used. Adjustable leather shoulder straps designed for comfort on a wide range of body types. All rivets and grommets reinforced with extra thick old bull leather for extremely high tear resistance at all stress points.