Bare Decor Nori Shower, Spa, Door Mat in Solid Teak Wood and Oiled Finish, Large: 31.5" x 19.5" Genuine solid teak wood (Tectona grandis) is naturally mildew and mold resistant Indoor or outdoor use (shower, spa, sauna, balcony, deck, RV, patio, lawn) Dimensions: 31.5 x 19.5" x 1.5" Slip resistant and naturaly warm sufface No Assembly Required