The IMPACTO closed cell foam rubber kneeling mat reduces knee trauma and low back stress, plus protection from cumulative trauma. Designed for severe kneeling conditions on cold, hard steel, concrete, grating, gravel, wet surfaces, and dirt/mud. Heavy resilient closed cell foam is 1" thick. Convenient built-in handle. Self extinguishing, nonconductive, silicone free, and impervious to petroleum products. 6"L x 4"W x 1" thick. Kneeling Mat, 4 x 6 In., Black