Stars Edge Redux
A form-fitting elastic garment resembling a body stocking, with a rigid collar ring for attaching a helmet. A skinsuit is much thinner than a conventional vacc suit, omitting radiation shielding and heavy-duty climate control. It is often worn as normal day-to-day clothing by space crews who wear a full suit only for extravehicular excursions. It is also worn on worlds with poisonous atmospheres but moderate climates. The suit does not include air tanks, which must be provided separately. With the addition of a vacc suit helmet, it is sealed, providing climate control (-50° F to 150°F) and vacuum support.
This is extremely common. A suit of this type is worn by all spacecraft crews at all times. The reason for this is simple, in case of sudden decompression or other accident these can provide basic protection.