GYMAX Heavy Duty Snow Tube for Sledding 40” Inflatable Snow Sled with Canvas CoverDescription: The Perfect Companion for Endless Hours of Winter Fun! The 40 heavy duty snow tube comes with a durable canvas cover that consists of thickened 600D Oxford fabric and hard bottom, which provide better protection against harsh weather conditions, ensuring long lasting durability. The slick hard bottom also ensures maximum speed as you glide down the slopes. Besides, the inner layer adopts a rubber tire tube, ensuring good strength and