Answer:

wetsuit

Answer	Crossword Clue
WETSUIT	Diver's protection
WETSUIT	Triathlon attire
WETSUIT	Scuba diver's need

WETSUIT	Outfit aboard the Calypso
WETSUIT	Scuba gear
WETSUIT	Triathlon gear
WETSUIT	Diver's duds
WETSUIT	You might get into it before going under
WETSUIT	Diver's wear
WETSUIT	Diving duds
WETSUIT	Certain Coast Guard attire

WETSUIT	Diver's attire
WETSUIT	Kayaker's attire