See also Continuity Guide
Four of the six spacesuits, reunited after 40 years at the Alpha:2014 convention. The suits were numbered, generally reflecting the on-screen number seen on the packs (no. 1 for Martin Landau, and so on). The neck rings, gloves, belts and helmets have become mixed up, probably even in filming, and don't always match the suit number. From left to right:
The other 2 suits are shown here
This is suit number 3 spacesuit.
The zips aren't pockets- they are just decorative. A "practical" pocket was added in Black Sun, on Bergman's left leg, so he can pull out a cigar. Later a similar pocket was fitted to Helena's spacesuit and another suit.
Below: the helmet ring is secured using a ring of Velcro around the neck, and one or two metal poppers in the back. Note the additional Velcro patch in the centre, to help the backpack stay in place. In the first series, there were just two Velcro patches on the front, not a complete ring. These were in black Velcro (or, for Helena, in white), and could be clearly seen in the episodes.
Contents copyright Martin Willey. Thanks to Mark Shaw, Andrew Frampton, David Sisson, Jim Winch.