Inspired by climbers, then refined to perform across a broad range of alpine activities, the Delta is 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. Performing as a midlayer in cold conditions or a standalone in cooler temperatures, its versatility and comfort make it an essential piece of any mountain kit.