The Ursack Major is a lightweight yet extremely durable alternative to traditional canisters and is one of our best-selling products. All Ursack bear bags are made of ultra-high-performance UHMWP fabric and designed to prevent bears from getting your food in their territory. The Ursack Major is a lightweight yet extremely durable alternative to traditional canisters and is one of our best-selling products. All Ursack bear bags are made of ultra-high-performance UHMWP fabric and designed to prevent bears from getting your food in their territory. Cord: 6 foot-high tensile strength with reflective tracer Reflective Exterior Tag for increased visibility at night Recommend: Odor Barrier Bag (OP Sak 12 x 20), designed to be used inside the Major for additional protection. Collapsible and easy to store