Our heavy duty tarps come in canvas and polyethylene. Poly heavy duty tarps are waterproof and canvas heavy duty tarps are great for painting and many other applications. The canvas heavy duty tarps also hold up to windy conditions very well. Our size range varies from small to very large heavy duty tarps so no matter what the task we can cover that large area. The 6 oz. on up poly tarps are heavy duty and do not let water inside and with protect against the rain.