Thin Pockets® are designed for destruction in mind. We want to offer our foraging friends a wide variety of foraging options. This Pocket is made with 3-4 oz leather and might have fewer refills before you will need a new one. Thats okay! We want our friends to feel satisfaction and accomplished in their day. This Pocket is a great Pocket for first time foragers as well as the holes are the easiest to manipulate.