Ready for duty: ROCKBROS skull cap is a good choice to protect your face from wind. The cap liner is tight fitting and keeps your head, ears and nose warm. It is much easier to use than a scarf, the perfect helmet liner for your bike commute or skiing

Thermal Fleece: The skull cap hat is made of Tension Fabric, a kind of moisture wicking and warm fabric, ultra flexible and lightweight, only 35g for the whole hat. The cap is very thin, but blocks the wind so much that your head stay warm, no cold air could blow through

Breathable design: this balaclava with hundreds of exhalation holes covers your mouth and nose, so you can breathe in the fresh air at will. Reduce the chances of fogging up your glasses. Meanwhile, the cap with the skull cap is made of moisture The absorbent material is quite breathable and absorbent without becoming too heavy

Premium Helmet Liner: our helmet liner fits perfectly under bicycle, ski, snowmobile and motorcycle helmets. It sits in place while riding or doing other aggressive activities. Not only provides you with heat retention and high comfort, but can also be easily folded and stored in your bag or bike case. Order now early in the winter

One size fits most: the bike cap is quite flexible and fits most adults and teens. It is suitable for head circumference (21.26-24.41 inches (54-62 cm), even if you have Einstein size noggin ROCKBROS offers 100% satisfactory guarantee. If you are dissatisfied, please feel free to contact us.