The smart Knit neck warmer uses an off centre stitching technique that makes it adjustable.
The two layers of fabric are sewn with a twist in built, when one end is opened then the other
end closes up - this is how the beanie hat shape is made. If both ends are evenly opened then the band can be worn as a neck warmer or headband.
The band has a thick and full shape which makes it excellent at trapping heat and stopping cold air from getting to your neck. It is soft against the skin which prevents irritation.