The North Face Mountain 25 Dual doors with poled front vestibule Polyurethane (PU) port window, cold-crack tested to -60&deg;F Floor Area: 32.5sqft (3sqm) Vestibule Area: Front: 8sqft (0.7sqm); Rear: 3sqft (0.3sqm) Fabric: Canopy: 40D 240T nylon ripstop; Fly: 75D 185T polyester ripstop coated with 1500 mm PU; Floor: 70D 210T nylon taffeta coated with 10000 mm PU