Easy on and off with built in elastic draw string and (3) heavy-duty adjustable straps. Takes about 30 seconds after first installation. Great value!(2) 10' kayaks are stored in a dock rack fully exposed to sun, rain, and wind. Offers a lot of protection and keeps unwanted insects, dirt, and bird droppings out of kayaks. Thanks to the adjustable straps the covers haven't moved an inch even in high winds.See full review