Our weather cover is made out of durable polyester material and is designed to protect your Trampoline during the winter or in harsh weather. The weather cover will also keep leaves and dirt off your Trampoline to make it a safer and cleaner jumping environment. Weather covers designed to fit Round Trampoline Frames that have 4 W or U-shaped legs. A great way to protect your trampoline from the elements. This weather cover design has attachable hooks for hooking onto the V-rings.