DuPont™ Tychem® 5000 Encapsulated Level B Suit. Flat Back, Rear Entry. Standard Visor, 1 Layer: 20 mil PVC. Elastic Wrists. Attached Socks with Outer Boot Flaps. Double Storm Flap with Hook & Loop Closure. Airline Access. One Exhaust Vent. Taped Seams. Tan.