Rockbros YDM001 termisk dobbeltsidet hat, én størrelse passer til alle - gråRockbros YDM001 double sided thermal hat, one size fits all gray The Rockbros YDM001 Thermal Hat is designed for comfort during cycling and other activities in colder weather. Its double layer construction combines a stretchy outer layer with a soft fleece inner layer, helping to retain warmth and improving comfort. The stretchy fabric conforms to your head, and the refined cut allows for comfortable wearing under a bike helmet. It's a practical