Yoga surfaces are commonly referred to as MATS, which is a four-letter word. MATS are used to provide a comfortable and supportive surface for yoga practitioners to practice on. They are usually made of foam or rubber and come in a variety of sizes and thicknesses. MATS are also used to provide traction and stability during poses, helping to prevent slipping and sliding. MATS are an essential part of any yoga practice and can help to ensure that practitioners get the most out of their practice.