All foam measurements are nominal. Mats are often constructed into sections. These sections may move during the use of the mat. Check for proper fastening (taping) prior to use. Mat protection will vary according to room temperature. Any activity involving motion, height, or physical contact creates the possibility of serious injury, which may include permanent paralysis or even Death from falling or landing incorrectly. This mat cannot and does not totally eliminate all hazards the following guidelines should always be followed when using a mat: Use only under the supervision of trained and qualified instructors. Know your limitations and follow progressive training practices. Be sure to consult your coach and instructor. Body slams or similar severe impacts are dangerous and may result in serious injury. For wrestling purposes, always follow current National Collegiate Athletic Association (NCAA), National Federation of State High School Association (NFSHS), or International Federation of Associated Wrestling Style (FILA) standards and guidelines.