ULTRA DURABLE and SAFETY MATTERS: The trampoline frame and enclosure poles are constructed of rust-resistant, thick-walled steel tube. The enclosure is equipped with strong, no gap, and UV-resistant netting. The enclosure door is secured with an anti-slip zipper and buckle system. The springs are covered with thick padding.TRUE TEST: 220 lbs weight capacity per trampoline actually means 220 lbs. The trampoline is independently tested per ASTM (American Society for Testing and Materials)safety standards and confirmed through accredited 3rd testing labs.