Non-slip bottom for increased stability while competition slides around. Questions: if you have any questions, please contact me, and I would be glad to assist you in any way. This item is in the category "Sporting Goods\Fitness, Running & Yoga\Fitness Equipment & Gear\Exercise Mats". The seller is "olympia_pommel_trainers" and is located in this country: US. This item can be shipped to United States.