Mammut Crag Sender Helmet Climbing helmet (56-61 cm, multi) - The Crag Sender Helmet from Mammut has been designed for use on crags. Not only is the lightweight and well-ventilated climbing helmet absolutely comfortable but it also provides lots of safety. Plus, thanks to its in-mould construction, the helmet is both durable and lightweight. In addition, Kevlar reinforcements have been included to increase resistance and to cope with strong external influences.As for the fit, both a practical adjustment system at the back of the head along with the fully adjustable chin strap ensure the perfect fit and won’t let the helmet wobble on your head. And, the helmet has been equipped with conveniently placed padding to prevent the formation of pressure points. Also practical: several large ventilation openings and an integrated air channel ensure rapid temperature regulation, which is specially perfect whilst climbing on warmer days.