Marmot Women's Power Stretch Full Zip Jacket has Power Stretch’s stellar combination of warmth, mobility, and quick-drying breathability make the Full Zip an extremely versatile mid and outer-layer jacket. Moisture and high relative humidity next to the skin cause discomfort. Polartec® Power Stretch® fabrics keep the skin dry and feature body-hugging 4-way stretch and are very breathable. They are very versatile, keep you dry when you sweat and provide warmth without weight.