The Hospital & Assisted Living Seat is constructed from Marine Grade Polymer (MGP), a durable material resistant to swelling, rotting, splintering, warping, fading, and chemical breakdown. It's 100% recyclable and environmentally friendly. Support legs are made of 1" x 2" Solid Aluminum with 1" Thick Solid Nylon Feet to protect floor surfaces. Certified Tested to Hold over 550 lbs. Report # CTLA 2079XW