Super lightweight mid-layer with PrimaLoft® insulation for warmth and moisture transport. Stretch panels on the sides, sleeves, and neck for flexibility. Sporty and slim silhouette for comfortable use as an under-shell jacket layer or as a standalone sweater. PrimaLoft® Silver Eco is a lightweight, breathable, and water-resistant alternative to down. Made from 70% recycled materials. This garment contains Bluesign® approved materials, an international certification for sustainable products and production processes. 8848 Altitude products are 100% free from fluorocarbons