Exervo HD20 3/4" Thick Premium EVA Foam Interlocking Protective Exercise Floor Mats - 2'x2' Tiles with Interlock Finished Edges Included 3/4" thick cross-linked, high density, premium Exervo EVA foam interlocking mats. Edging included! SHIPS GROUND ONLY. Infinitely expandable- add more sets to cover larger areas. Includes finish borders Transform your floor in minutes- easy, low cost solution that's easy to assemble EVA foam is a warm comfortable surface with no odor. Impervious to sweat and moisture US ASTM F963-07 Flammability Tests- PASSED EN-71 Toxic Elements Analysis- PASSED