A mid-layer is made for mountaineering during spring, summer, and fall that rocks the cross country ski trail, seems built for cold weather biking, and takes the chill off a winter run, the Norrona Falketind Warm2 Octa Men's Hoody is an incredibly breathable, wind-resistant, and versatile, midlayer. The Octa liner provides lightweight insulation with extremely effective moisture transport. Bonded to the warm2 face fabric, a 100% recycled fine-knitted recycled Polyester that is nicely soft and traps warm air without stopping moisture transport, the combination makes the jacket warm, durable, and wind resistant while allowing good moisture wicking to keep your core comfortable. When used alone, the fabrics in this jacket are open enough to allow air to circulate, making you feel comfortable in milder conditions. Under a shell they provide excellent insulation values. To optimize air movement, and trim the silhouette for use under a shell, the fabric on the back and under the arms is a stretchy 170 gr/m2 70% recycled Polyester for highly effective moisture transport and breathability. The pop up hood is compatible with your favorite beanie hat and thumbhole cuffs make gliding this into another layer smooth and easy. With a Y-cut and articulated arms for movement, a longer back for extra coverage, and seam free shoulders for wearing a pack straps this is the versatile layer you’ve been looking for to round out and give extra range to your aerobic sport wardrobe.