PPK-1 partial pressure suit, or "speed-jeans" - as this type of suits also known, was developed sometime around 1970 and stayed in service until recently; in fact, it might still be used in some of the units.

PPK-1U is an extremely simple design - there is a wide waist area with a bladder inside and two leg parts with zippers for pilot to easier get into the pants. Each of the leg parts has a round hole in the middle, where pilot's ankles located. Both upper and lower portions of the leg parts have adjustment laces. During high G maneuvers, suit tightens lower torso and leg muscles to slow down the flow of blood towards pilot's legs and inflated bladder fixates internal organs in place. Combination of these two allows pilots to sustain higher G loads before starting to blackout.

Vympel, manufacturer of the suit, says that PPK-1 "speed-jeans" have a useful life of 10 years since the date of production.

PPK-1 suits are available in sizes 1 through 5.

 

PPK-1U carrying bag. It was still sealed when I got it.
Close up shot of the stamp on the bag. First line gives the name of the suit, second line is its serial number and third line is the size of the pants. This stamp is identical to the one on the suit.
Documentation papers of the PPK-1U suit. Near the bottom of the front page is year of production - 1975.
PPK-1U from the back.
Same suit from the front. Note adjustment laces on the waist area and upper and lower leg parts.
PPK-1U stamp is located inside of the suit's waist area; it is identical to the one on the carrying bag.
Suit's pressure hose.