Tumbleweed's Worm Blankets stimulate activity in your worm farm. Thicker than a hessian bag, constructed from breathable 100% natural materials, and featuring a convenient handle, our Worm Blankets establish the dark, moist, aerated environment that compost worms flourish in. Just place the blanket over the food scraps in the top working tray. Made from 100% natural fibres, our blankets will biodegrade as your worms generate more activity in your worm farm. Expect each blanket to last 4-6 weeks before needing to be replaced. Dimensions: Round 47cm Diameter. Makes your worm farm more productive by increasing activity.