The outdoor signature Expect the same comfort and reliability from our Outdoor Family as you would from Irwin Seating, the largest manufacturer of fixed seating in North America. This entire lineup is impervious to weather.Just hose down and drip dry! The seat and back is upholstered in a marine grade vinyl that is mold, mildew and UV resistant yet has an incredible hand closely imitating the finest leather. Rain or shine, it really doesn't get better than this!