Noun
a weighted and hermetically sealed garment supplied with air; worn by underwater divers
Source: WordNetThe DSEA was adopted by the Royal Navy after further development by Davis in 1927. citation In 1912 the German firm Dräger developed their own version of standard diving dress with a self contained gas supply from a rebreather. Source: Internet
Having been presented to the Exposition Universelle in Paris Cabirol's diving dress won the silver medal. Source: Internet