The Madison Isoler Merino Winter Cap is a perfect under helmet accesory for cold weather riding.Madison Isoler Merino Winter Cap Highlights-Shaped to work underneath a helmet with minimal seam irritationUnlike man-made fibres, Merino wool retains its thermal properties when it's wet to better regulate the body's temperaturePeaked brim keeps the sun or rain away from your faceFold up rear panel allows you to expose the ears if you begin to overheatLimited lifetime warranty
Best Price: £19.99 from Leisure Lakes Bikes