Stabilizers are constructed of heavy duty PVC enclosed in 420-denier nylon covers and Training Wheels are made of heavy duty PVC only. Stabilizers will provide extended life in comparison to Training Wheels. This is due to their nylon cover acting as an extra protective layer that will withstand more wear and use over time than the Training Wheels whose PVC is exposed at all times.Do you already have an inflatable SUP paddle board but you also love fishing or just being out on the water The Airhead SUP Stabilizers allow you to convert any SUP to a stable platform. This means you can go out on the lake for fishing, to do some calming yoga or this even allows for you to bring your child or favorite pet along with you! You may already have a few inflatable paddle boards, but our Airhead SUP Stabilizers allow you to turn your paddle board into an entirely new adventure! Convert any SUP to a stable platform for fishing, yoga or bringing a dog or child alongGreat for beginners, rough water & plus size paddlersRugged nylon covers protect the PVC bladders insideInflate/Deflate in seconds with patented Speed Safety Valves