DYNAFIT ST HELMET. Lightweight and highly ventilated Ski Touring helmet with double certification. The certified ST Helmet is specially made for ski tourers who value minimal weight. Ski touring certification means the helmet is certified for both Alpine skiing and mountaineering. Double the protection in one helmet! Furthermore, this helmet offers plenty of ventilation so you have enough air circulation on the ascent. Aside from cooling your head, you also keep your ears warm with removeable earpads. An adjustment dial ensures an individualized fit for every head. A helmet for ski tourers with a brain.