Buff added their new ThermoNet technology to the Multifunctional Headwear piece you already know and love. Designed for cold weather activities, it delivers four times the insulation of Buff's original microfiber construction, without adding extra bulk. And of course, Buff's Multifunctional Headwear lives up to its name, so wear it as a balaclava, a neck gaiter, a headband, or a pirate cap--the opportunities are endless.