Offroad Bisk BirdStay hydrated and pump carbs. That with Bisk Bird. Crisp white with a biscuit coloured Grutto characterises this Offroad cycling sock by Grutto Design. An atypical colour for a dusty off road environment, but therefore all the more striking. Make a statement, show no fear of mud on your sock and pamper yourself to the max. Especially for off road cyclists the 'Offroad sock'. For on the MTB, gravel bike or crosser it doesn't matter as long as the