Specific combat areas consist of contact sports mats - various thicknesses and colors - or floors or platforms. Judo has taken traditional Japanese tatami using it both in training and in competition. In today's competitive tatami has a thickness of 4 cm is made ​​of a very dense Burt (230 kg/m3). Generally a mattress has dimensions of 2x1 m Karate and Taekwondo are also over-sized tatami use. They have a thickness of 2-3 cm and are made of polyvinyl acetate - a substance that protects against sudden shocks, resistant to moisture, is antibacterial, oil resistant, antistatic, non-toxic, environmentally friendly. The grip is the puzzle and mattress size 1x1 m Boxing fight is one of the areas oldest and most famous. Whether it's about training rings composed only of ropes or rings marking surface AIBA competition, all designed to make the area of combat sports like boxing, kick boxing or Muay Thai.