T Mat Pro Transition Mat Personalize your mat by writing your name with a permanent marker (Sharpie pen suggested) on the white strip beside the T MAT PRO logo. Measures approximately 21 x 30 inches Rolls up to fit easily to transport in a suitcase or backpack. Bright colors identify your transition space at a triathlon. Clean-up is a breeze. Simply wash the mat with water. Apply Shout stain remover on tough stains.