MSK-3M suit is one of the early Soviet survival suit designs. Suit has only one extension hose for ventilation system, so it's likely that it was mostly used by helicopter and bomber pilots. I've also heard that Yak-38 pilots used to use it, but to date found no evidence of this. MSK-3M design is very different from later MSK-4 and VMSK-4 designs. Outer suit does not complete cover pilot's body, instead it should be used with special boots that are sealed and secured to the suit. I assume this was done to allow for all pilots of a given height to have boots of the size each of them needed. In theory it sounds like a better idea then a 'built-in' sock on later suits, but in reality there is a high risk that boots, despite being secured to the suit, would be torn off from the suit and off pilot's legs during ejection. With nothing to protect his feet, pilot would have only a little chance to survive in cold water. Another big difference is that MSK-3M comes with it's own floatation vest. Vest is attached to the back of the suit and is normally covered by orange material. In case of emergency, pilot should pull on special cord which removes pins that hold suit's cover over the vest in place and activates CO2 cartridge that in turn inflates the vest. The whole system is rather complicated and later suits used separate ASP-74 pouches which are much easier to operate. Special three-finger gloves are used to cover pilot's wrists. They are similar in design to what is found on later models of survival suits. Gloves are stored in two pockets located on the back of the suit and are worn only after pilot ejects (i.e. they are not used during flight).   Front view of the MSK-3M suits. Note two-section pockets on velcro pads on the right chest, small pocket on a string on the left chest and one additional pockets on a zip lock underneath it. Additional two pockets are located on each of the hips. Located on the left waist area is an extension hose that connects inner TVK-3 suit with aircraft's ventilation system. Right chest pocket has two compartments. Each of them contains tubes for manual inflation of various sections of the survival vest. Small pocket on the left side contains a ripcord for the survival vest. When ripcord is pulled, it removes pins that cover the vest on the back and discharges small CO2 cartridge to automatically inflate the vest. Inside, MSK-3M suit has a built-in suit made from rubberized material. Shown here is the ID tag of the VZK-3M internal suit. Located on the inner side of the MSK-3M suit is a small vertical pocket. MSK-3M's ID tag is located on the hood. View of the MSK-3M suit from the back. Note large rectangular "pocket" that covers floatation vest and two vertical pockets for three-finger gloves. Floatation vest stored on the back of the suit. Floatation vest has it's own ID tag... MSK-3M suit uses special boots that attach directly to the suit. The right leg side has a rolled up suit material to show heavy duty rubber joint that goes over the top portion of the boot. Two strings are used to secure boot to the suit. Here is how it looks with suit covering the joint. Three finger gloves are stored in the back pockets of the MSK-3M suit. Unfortunately ID stamp made in black ink faded away and I was unable to read their designation.