Your trampoline is a blast for the kids, and, be honest, you have fun jumping on it too, but keeping everyone safe is your top priority. Give all the mom's on the block peace of mind by installing the 33 Inch Trampoline Pole Foam sleeves - Fits 1.5 in. Posts. These thick sleeves are a snap to install and are made of durable, 1-inch thick premium EVA foam. They measure 33-inches long, fit 1.5-inch trampoline posts, and are available in sets of 12 or 16.