Answer:
Unas sudaderas.
Explanation:
The first choice is a bathrobe, and I dunno why you would need that when you are cold.
The second choice is a sweatshirt, which would make sense.
The third choice is flip flops, which you don't need in the cold.
And the fourth choice are some shorts, which are also not needed in the cold.
So, unas sudaderas would make the most sense.
