This is an essential piece of any serious mountain kit. Inspired by climbers, then refined to handle virtually anything, the Delta Jacket’s a go-to when thermal efficiency, stretch, and all-mountain versatility are required. The Polartec Power Dry fleece’s voided grid construction delivers a high warmth to weight ratio and provides outstanding freedom of movement. The simplicity of design extends its versatility – wear it as a midlayer in cold conditions or a standalone in cooler temperatures.