The Black Vault

You're starting to see a pattern of people observing one piece coveralls and ET's or UFO occupants wearing a helmet.

Examples listed here:

http://nawewtech.angelfire.com/suit.html

http://nawewtech.angelfire.com/helmet.html

What do astronauts or fighter pilots wear? Something similar right?

What's interesting is a lot of the times the craft are described as having no seams or riveting and the occupants coveralls are described as one piece with no zippers, seams, stitching etc.

From: http://www.nicap.org/occupants_hall.htm

Sightings of UFO occupants have occurred steadily over the years, but tend to increase during sighting waves. By far the most common type is the small humanoid wearing "coveralls" and some kind of headgear, usually round or helmet-like. During close-range encounters with beings outside of their UFO craft, witnesses sometimes have heard unintelligible vocalizations and observed technological "tools." They have been observed "taking samples," "repairing their craft," and engaged in other activities.