The Berg Champion 330cm has an Airflow trampoline mat that allows 50% more air to pass through than normal trampoline mats. This means that there's less resistance during jumping, which lets your child jump higher. In other words, more jumping fun. Thanks to the extra-wide and thick trampoline safety pad (38cmx30mm), you can be assured of good protection for the springs. These TwinSpring Gold springs are sturdy ones with a significant zinc layer. They're placed diagonally, which means this Berg trampoline contains 30% more springs than the Berg Favorit trampolines. This significantly increases the bounce and durability. The frame is galvanized and powder-coated, making it rust less quickly than when the frame hasn't been treated with these techniques.