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There wasn't a lot of red already on the spacesuits. At least one suit used a yellow stripe: Apollo 15 backup commander Dick Gordon. …

Edit: Uwe posted his answer 8 seconds before mine. I've run his numbers using moles, and come to the same conclusion. There is 1.0 lb O$_2$ x (1000 g / 2.2 lb) x (mol O$_2$ / 32.0 g O$_2$) = 14.2 mol …

During the service module spacewalk during Apollo 15-17, all three astronauts' spacesuits were connected by umbilicals to the command module. …

There was no need for astronauts to adjust the laces. Laces were for sizing parts of the suit, not for putting them on or taking them off. Unpressurized, the Mark IV was considered comfortable, and …

The answers below are from Apollo Experience Report: Development of the Extravehicular Mobility Unit, NASA Tech Note D-8093. The air inside the suits was always 100% oxygen. Yes, even after the Apo …

Yuri Gagarin wore the first space suit in 1961, the SK-1. It was orange.

This close-up photo of Neil Armstrong's feedport from a NASA webpage appears to be hook. OrganicMarble was therefore correct that it varies between astronauts, as a personal preference item.

However, the practice has historically been done in spacesuits to prevent ballooning when the suit is pressurized. … Apollo spacesuits had restraint cables that were hidden inside the suit. …

To answer the medical aspects of this question, all Apollo spacesuits had a hypodermic injection port in the right thigh. …

We have an answer for Shuttle, and an answer for ISS. Here is the answer for Apollo. The main strategy was to prevent sweating in the first place. The astronauts wore a Liquid Cooling Ventilation …

The serial numbers of the Apollo spacesuits are documented on this NASA webpage. …

Knives, guns, survival food, and water rations have all been parts of spacesuits. Rescue. … Spacesuits also often carry radios, radio beacons, mirrors, flashlights, and glow sticks. …

The 2008 paper Lunar Dust Effects on Spacesuit Systems: Insights from the Apollo Spacesuits studied the outer-most layers of Apollo 12 LMP Alan Bean's and Apollo 17 LMP Harrison Schmitt's EVA suits, Schmitt's …

Intravehicular spacesuits are worn inside the cabin in case of emergencies, particularly during ascent and descent. The Mercury suits were manufactured by Goodrich. … Extravehicular spacesuits are used for spacewalks and moonwalks. Some of the David Clark suits for Gemini were modified for EV use. …

Both the moon and Mars have very rough terrain, which is hard on spacesuits. …