Fun Spot’s Sun Shield™ adds years to the life of trampoline mats by protecting perimeter stitching from UV-exposure. Typically, the rows of stitching around the perimeter of trampoline mats last about 30% to 50% as long as the actual fabric. After this perimeter stitching fails, trampoline mats must be repaired or replaced. SunShield is a heavy-duty webbing, wider and heavier than seat belt webbing and it is sewn on top of the perimeter stitching of trampoline mats to protect them from UV-exposure. SunShield will approximately double the life of your structural stitching. While the stitching on basic trampoline mats is warranted for 2-years, SunShield extends this stitching warranty to 4-years.