Mat

A mat is a cushioned, padded surface laid over a hard floor so athletes can grapple, strike and work at ground level. Depending on the discipline it may be a firm tatami-style panel used in judo, karate and aikido, a thicker interlocking or roll-out mat for wrestling and Brazilian jiu-jitsu, or a thinner exercise mat rolled out for calisthenics, yoga and pilates. The core is usually dense foam, rubber or padding under a textured vinyl or rubber cover, so it feels firm enough to stand and push off from yet soft enough to give underfoot.

Because the surface absorbs impact rather than returning it, there is effectively no bounce: throws, takedowns, rolls and falls are cushioned instead of rebounding, so grappling, throws and floor work stay controlled and close to the mat — though striking arts use the same surface for fast, dynamic kicks and footwork. The grippy top layer supplies traction for feet, hands and body, so athletes can plant, pivot and hold position without sliding. Mats are typically laid indoors and are often modular — panels, tiles or roll-out sheets — which lets the same kind of surface be set up in a dojo, a gym or a studio.