Product Details Brand: ROCKBROS Color: Black Material: 82% Polyester + 10% Elastane + 8% Nylon Weight: Approximately 96g Size: One - size - fits - all Features Breathable and Warm: The inner side of the mask is lined with warm single - sided velvet, making the entire mask warm and able to regulate temperature. There is space around the mouth and nose to allow breath to pass through the fabric. Wind - proof Hem Design: The extended hem structure retains heat and prevents cold wind from entering the neck. The back of the hood is equipped with an expandable zipper, and the helmet can also be put on and taken off easily over the shoulders. Good Elasticity: Made of elastic fabric, it is comfortable and not tight. It has good wear - resistance and can be worn with a helmet without squeezing the head. Multiple Reflective Designs: The hood has reflective designs on both the front and back to improve safety at night. Thoughtful Design: Combining ergonomics, it fits the face well, providing 360 - degree face protection and neck warmth. It can be worn with motorcycle, electric vehicle, bicycle, or ski helmets.