The hard bottom shell reduces friction on the snow, resulting in a smoother, faster ride down the slopes. The 48” size is best for adults and has a recommended weight limit of 175 lbs. This sled is made from sturdy HDPE that’s able to withstand temperatures as low as -30°C/-22°F. Retrorider sleds include pre-knotted nylon tow ropes to make uphill pulling easier.