With the Neothermo Hoody made from Polartec Power Grid fleece, you are well-equipped for both ascents and descents. The uniquely constructed fleece offers low weight while providing high thermal performance and quick drying capabilities. Additionally, the Neothermo Hoody is extremely packable and feels very comfortable against the skin. Polartec Power Grid This technology was developed by Polartec to further enhance base technologies. By creating a patented grid structure, Polartec discovered a new way to reduce fabric weight while increasing warmth and compressibility. This grid structure improves both wicking and breathability by creating channels with targeted contact points that absorb and diffuse moisture vapor.