Summer or winter clothes?
WHAT'S THIS? DO YOU WEAR IT IN WINTER OR IN SUMMER?
It's a jacket. When it's cold in winter.
WHAT'S THIS? DO YOU WEAR IT WHEN IT IS HOT OR COLD?
IT'S A SCARF. WHEN IT'S COLD.
WHAT ARE THESE? DO YOU WEAR THEM IN WINTER OR IN SUMMER?
THEY ARE SHORTS. IN SUMMER WHEN IT'S HOT.