This one-piece jumpsuit comes equipped with a domed glass helmet. While wearing it, you can breathe underwater or in the vacuum of space for up to 24 hours at a time. The suit also protects you from extreme temperatures and pressures (see the Glossary), inhaled poisons and gasses, and contagions. You can wear the suit underneath a suit of armor. To replenish its air supply, the suit must be removed for 2 hours.