SkyBound All Trampoline Mats for Airzone Variflex Trampolines Designed to Fit Airzone Variflex Brand Trampolines. This is the MAT ONLY! Springs are NOT INCLUDED! Measure Your Frame Size Directly Across End to End. Count the Number of V-Rings or Springs on Your Current Trampoline. Measure the Length of Your Current Springs, Off the Trampoline and Unstretched, From End to End Including the Hooks.