The Nuclei FL is a windproof, light, and packable Coreloft™ insulated hoody for climbing and other alpine pursuits. 

Fast and Light (FL) alpine travel’s static phases require you to stay warm while protecting yourself from chilling winds. Inspired by persistent athlete demand, and redesigned to their exacting specifications, the next-generation Nuclei FL Jacket is lighter, more resilient, and delivers outstanding thermal performance for remarkably little weight. The Arato™ 10D ripstop is windproof and durable, Coreloft™ insulation provides effective warmth – even when wet – and the insulated StormHood™ adds protection.