I used this helmet once for mountain climbing and a few times for cycling, but I no longer use it, so I'm selling it. Lightweight and breathable Black Diamond Vision Helmet, perfect for mountaineering and climbing. - Brand: Black Diamond - Model Name: Vision Helmet - Size: M/L (Head circumference 58-63cm) - Color: Black - Features: Lightweight design, breathable construction Black Diamond Vision MIPS The Vision helmet features MIPS technology to enhance protection against rotational impacts. It incorporates a smoothly movable cup between the head and the helmet body, effectively dissipating impacts from oblique angles and preventing concussions. The body, which combines EPP and EPS foam with an ABS shell, meets UIAA standards for side and rear protection and features ventilation ports to enhance breathability in hot weather. ・Features MIPS technology to enhance protection against rotational impacts ・The EPP+EPS+ABS composite shell makes it the most robust BD helmet ・Slim suspension system for enhanced portability ・Integrated headlamp clips that won't snag ・Removable and reversible pads Weight: 260g (S/M size, actual measurement) Sizes: S/M = Head circumference 53-59cm M/L = Head circumference 58-63cm