Bare Decor Lykos String Spa Shower Mat in Solid Teak Wood Oiled Finish, Large Genuine solid teak wood (Tectona Grandis) is naturally mildew and mold resistant Roll it up for easy storage, carry and cleanup Indoor or outdoor use (shower, spa, sauna, balcony, deck, RV, boat, patio, lawn) Slip resistant and natural warm surface No assembly required