Hybrid vigor, the Mountain Hardwear Women's Solidus Jacket with Polartec(R) Power Stretch(R) Hardface melds the stretch, warmth, and breathability of a fleece with the protection of a soft shell. Treated with an advanced surface-fusion polymer for abrasion resistance and water repellency, its Power Stretch side panels add stretch and breathability where you need it. Wear the Solidus Jacket alone, or use as a mid-layer.