This is a Russian FOREL hydrosuit, used for emergency water landings of the Soyuz spacecraft.
The one-piece nylon suit includes an inflatable collar, emergency beacon and signal device. It has rubberised cuffs, Velcro-close pockets on the legs, and a pair of brown jersey mittens with separate thumb and index finger stalls, with watertight cuffs and adjustable orange nylon wrist straps. The integral rubber-soled boots can be cut off and used as overboots for crossing marshy terrain. The suit is signed on the left shoulder by the by cosmonaut who wore it.
Thanks to Craig and Tania Sanders for their generous support in acquiring this suit.