All-in-One Item Worn to Stay Warmer in the Waves
Puzzle 13 of Happy Hour Piece of Cake Pack
Question is: All-in-One Item Worn to Stay Warmer in the Waves
and the answer is: WETSUIT
Word Meaning:
WETSUIT — A close fitting, insulating garment usually made from neoprene or similar material designed to keep one warm during activities on or under water.
Definitions from Wiktionary.