This is the perfect hat for the 'shoulder seasons' or layered under hoods.  The mix of merino wool and silk makes for a very light and soft hat while giving gentle protection.  The hat is quite generous in size.  A small to medium adult head is fine with size 54.   

70% Organic Merino Wool / 30% Silk

*Measure around the brow of the head in centimetres to determine the size.