Lightweight, seamless and incredibly thin, the Thermonet beanie is so soft and stretchy that you will forget it is on your head. It wasn’t the warmest piece of headwear on test, but for its size it performed incredibly well, even in blustery conditions. Its strength lies in keeping your head at a steady temperature particularly when working hard. I can see that it will be a go-to piece for a wide range of activities because it fits well under helmets and hoods. The neon yellow colour wasn’t terribly flattering, but at least I could be seen easily on the hill and Buff have a range of colours to choose from.
VERDICT: Good for cool days or where space is at a premium.
BEST FOR: Practical in a variety of situations, so add it to your bag for every occasion.