The Mammut Arctic IV ML Hooded Jacket might just be the last fleece you'll ever need to buy, seemingly pulling off the tight rope walk between cozy casual hoodie and versatile mid-layer for long days in the outdoors. The hi-loft Polartec Thermal Pro Fleece material is soft, warm, and durable, designed not to pill no matter how many days we wear it in a row. The elasticated hood, hem, and cuffs keep heat sealed in as we warm up at the base of the crag, and the flat seam construction means we can wear a heavy backpack for hours without destroying our shoulders.