2'x4' Multiple Sizes. AREA RUG PAD. Manufacturer: Carpenter Style: STAINMASTER Premium 1/2" Visco-Elastic Memory Foam with DuPont(TM) Hytrel(R) RS renewably sourced(TM) film. For area rugs, runners and carpet. By far the DENSEST Visco-Elastic MEMORY FOAM cushion for the feel under your feet. A full 1/2" THICK pad! Hypoallergenic - ozone friendly (no CFC's) Makes any carpet or rug feel more luxurious under foot. Protects your investment by enhancing carpet performance. DuPont(TM) Hytrel(R) RS renewably sourced(TM) moisture barrier breathable film.