- 6-Piece Puzzle Design - Covers 24 sq. ft. - Interlocking Pieces - Non-Slip Foam Material - Lightweight - Water Resistant - Mold and Mildew Resistant - Easy to Clean - Border Edge Pieces Included Keep your floors protected with this 6-piece, interlocking puzzle exercise mat. Made of non-slip foam material, this mat allows you to grow and expand your home gym with multiple kits. The lightweight mat is water, mold, and mildew resistant, and provides a layer of superior protection between your floor and exercise equipment.