For critters–not bears. The Ursack Minor is made of a fabric woven from Kevlar “bullet proof” fiber. The highly cut resistant weave prevents sharp toothed critters from getting your food. Ursack Minor will NOT protect against the strength of a bear. The Minor weighs about 5 ounces, and is 8 inches in diameter, 13 inches tall and holds about 650 cubic inches. If packed only with freeze dried food, it will hold about 37 servings of breakfast, lunch and dinner. It comes with a Velcro closure and an integrated loop to clip a carabiner or tie a cord to.