Bouldering gym crash mats is high quality and heavy duty crash pads for your bouldering gym and climbing walls. Heavy duty reinforced waterproof fabric shell with anti-slip properties Zipped closure Weight per mat: 16 kgs. Also great for use as Gymnastic mats Dual density foam cushioning. The upper closed cell foam layer distributes the weight evenly. The lower open cell foam layer cushions your fall. Size: 6' (L) x 4' (W) x8″ (t).