The Filament Beanie is built with our 94% recycled Thermic™ S fleece. It has stripes of high and low lofting fleece inside, providing warmth in a low bulk and breathable package, ideal for high energy ascents. Close-fitting with minimised seams, it fits well under a climbing, skiing, or biking helmet, giving you an extra boost of warmth without the weight.
Most of our hats come in one size which will comfortably fit a 55 - 59cm head. If you have a smaller or larger head circumference, we suggest trying one on to be sure it's comfortable.
For hats that have size options, check out the chart below for measurements.
| Size | Head circumference |
|---|---|
| S-M | 18 - 19cm / 7 - 7.5in |
| M-L | 20 - 21.5cm / 8 - 8.5in |
| Size | Head circumference |
|---|---|
| One size | 56cm - 60cm / 22in - 23.6in |
