Thank you for viewing. This is a men's Giro snowboard helmet for sale. The inner diameter measures approximately 59cm, so compared to current models, it's likely a men's M size. It's a fairly old model, but it was dried and stored in a bag after the last use, so the condition is relatively good. The vents can be opened and closed with the lever on the top of the head. (Image 6) There are small scratches on the top of the head due to use (Images 6 & 7), but there are no problems with actual use. Thank you. (AI-generated below) Dark blue ski/snowboard helmet with air vents. - Brand: Giro - Color: Dark Blue - Type: Ski/Snowboard Helmet - Design Features: With air vents - Shape: Aerodynamic design Thank you for viewing.