Product details: Brand: ROCKBROS Material:Type1: Brushed nylon lycra + anti-slip cloth Type2: Brushed nylon lycra + anti-slip cloth + fine mesh Type3: Brushed nylon lycra + anti-slip cloth + fine mesh Weight:Type1: approx. 45 g Type2: approx. 34 g Type3: approx. 45 g Colour: Black Size: One size fits all Attention: All three models are equipped with different anti-slip cloths, see pictures. At the same time, only one mask is sold via this link and other products in the picture are not included. Type 4 masks have no anti-slip function and are mainly intended for keeping warm. Features: Comprehensive warmth: Equipped with thermal lycra lining, which wraps the head 360 degrees, windproof and warm, retains temperature, skin-friendly and comfortable. Give you warmth in winter. Equipped with goggle holes: All four masks are equipped with goggle leg holes, specially designed for short-sighted people, making it more comfortable and user-friendly to wear glasses. Large-area anti-slip design: Each mask has a different anti-slip fabric design that moulds to the skin and does not slip easily when wearing the helmet. High elasticity and breathability: The second and third mask models are equipped with breathable mesh on the mouth and nose, which not only keeps warm, but also has good breathability and does not block the mouth and nose. The fabric is soft, elasticated, comfortable and not tight. Reflective + worn with a helmet: The four masks have different reflective markings that make night riding safer. Wearing a face mask does not affect the wearing of the helmet and motorbike/e-bike/bicycle helmets can be worn. Pay equal attention to warmth and safety.