Waterproof ripstop 16oz 100% superior cotton canvas with ripstop polyester grids providing extra fabric strength. Waxed waterproofing treatment process, 3-way chest fitting allows versatile fitment, shoulder gussets, rump darts, tail flap and matt black chest buckles, removable leg straps with nickel-plated fittings. The Eureka Unlined Canvas Combo is sewn together using a quality waxed cotton thread. The rug must be hosed down before use so the waxed cotton thread will swell up and expand into all sewn areas enhancing the waterproof treatment. Hosing down the rug before use will also wash away any excess surface colour dye. Ensure rug is completely dry before storing it away. It is recommended to apply a canvas re -proofing compound before the start of each new season.