Cotton shirt on wide straps - so...
Headset for parachuters during jump time. Was also used by fighting vehicles crews (BMP, BTR, etc.).
Early version headset for airborne troops. Soft inserts protect the head.
Complete headset of Soviet and Russian tank soldiers. Used in all types of tanks and an armoured vehicles. Communication with receivers and laryngophones (microphones). Version with six protective combs - led in 70's years and produced to present.