The really cool mats Velcro together and have a solid top like a landing mat.   They are 6” thick.   3 mats together for perfect under a beam.    We have 16 of these for ONLY $199 each.   These are made by Asana for climbing walls.   They are high quality and sell for over $600 each normally.   They work perfect in the gym for throw mats or connect them to make landing areas.