Delivering ample movement and warmth is what the Marmot® Advanace Jacket does. This flexible zip-up is made from a blend of polyester and elastane jersey stretch fleece. Its streamlined design allows it to be worn as both a base- or mid-layer, while also delivering standalone warmth in mild conditions. Flat Lock seam construction reduces chafing when its paired with minimal layers. A bonded zip sleeve pocket offers storage for music devices.