SPECS: S/M Weight: 225 grams L/XL Weight: 250 grams S/M: 52-57 cm. L/XL: 56-61 cm. DESIGN & DETAILS: The first climbing helmet featuring MIPS technology Ergonomic design with substantial cushioning fits every head shape comfortably while providing ultimate protection The helmet is subjected to an angled impact with a low friction layer that allows the helmet to slide relative to the head, redirecting any impact so it will be absorbed by the low-friction layer rather than the head TECHNOLOGY: MIPS offers maximum safety and protection from impacts while climbing The core of the helmet is designed with a cushion core made with EPP (Extended Polypropylene) The exterior is partial hard shell that offers maximum safety