ASTRONAUT PILOT HELMET FLIGHT HELMET +FLYING SUIT MK-4-15. The best products, the lowest price. PILOT HELMET : Size : 1# xxl (52cm -59cm) Largest. FLYING SUIT MK-4-15 : SIEZ : P7# Height range (170-180 cm). The price of spacesuits and flight helmets is 1999 US dollars.