The plastics that are used for all Skamper-Ramps will not yellow, become scummy, grow barnacles, or mildew/algae when left in water (salt water, fresh water, pool water...). Skamper-Ramps always have been, and always will be, made completely from recyclable materials. Skamper-Ramps are lightweight with excellent strength-to-weight ratios, low-cost, and simple. The ramp braces to the vertical side of the pool, walled pond, stock tank or water trough to prevent unwanted wild animals from drowning as well as pets!