Covering 16.33 square feet per panel, this extruded polystyrene foam panel features reinforcement material and fleece webbing on both sides for secure anchoring in thin-set mortar. With its 1.5" (38 mm) thickness, it’s ideal for creating sturdy, waterproof structures like shower benches, partition walls, countertops, and custom shelving in wet areas. Perfect for contractors and homeowners seeking durable, tile-ready surfaces for specialized applications.