Hobie Mirage Tandem Island (all years) / Adventure Island (2015 and Newer) Aftermarket Trampoline Polypropylene UV resistant mesh and UV resistant thread, to hold up in sun and salt water Heavy duty 1 1/2 inch UV resistant straps and buckles 3/8" solid fiberglass rods in rear to prevent sagging All seams reinforce with at least 4 rows of stitching Mesh fabric allowing for airflow and water drainage