The Tumbleweed Square Worm Blanket increases activity in your worm farm. Thicker than a hessian bag, made from breathable 100% natural fibres, and with a convenient handle, our Worm Blankets create the dark, moist, aerated environment that compost worms thrive in. Place the blanket over the food scraps in the top working tray. The Tumbleweed Square Worm Blanket fits the Tumbleweed Cube Worm Farm, and the Maze Worm Farm. Our Tumbleweed Blankets are made from 100% natural fibre, so will break down as your worms generate activity in your worm farm. Your worm blanket should last 4-6 weeks before needing replacement.