The Neutron Jacket by Crazy is the ultimate choice for ski tourers and mountaineers facing extreme environments. Built for maximum freedom of movement, protection, and high-performance activity, it represents a fusion of cutting-edge technology and functionality.

Introduced in 2013, it was the first fully elastic jacket in the world – and it continues to set the bar. The Dermizax™ Toray nylon outer fabric is fully waterproof (20,000 mm water column) while offering outstanding breathability. The Primaloft® Active insulation ensures top-level warmth without limiting mobility.

A standout feature is its advanced seam construction: to maximize ventilation, most seams are left unsealed. However, the hood and shoulder areas are made from a seamless, fully taped structure – ensuring waterproof protection where it matters most.