Akammak.
 Aldar thermoregulator hat by the French / Canadian brand Akammak .
 This Beanie style hat is made from Akammaks patented Cold Winner a superb weight to warmth ratio fabric that has great breath ability and wicking properties.
The Akammak range were originally designed for endurance athletes and they are designed to minimize friction in prolonged use as base layer garments and are apparently popular with French forces .
 UK stockist and more info here @alphabushcraft https://www.alphabushcraft.com/collections/hats-and-headwear/products/aldar-thermal-hat-by-akammak














