Icebreaker Men's Cool-Lite Momentum Zip

This thing says sweater, but says for warm to hot. So,bis this a cooling summer shirt or a cold weather sweater?

'cmon guys. Little help here. Can I get an answer?

Our buyer says It is a warm weather sweater.

From the manufacturer site:

MADE TO
BREATHE.
COOL-LITE™

Cool-Lite™ combines two lightweight, natural, performance fibers - premium merino wool and TENCEL®, a wood fiber. The result will keep you cool in even the most hot and humid conditions.