On colder days, the Isbjorn of Sweden Cloud 1/2-Zip Fleece Jacket is a lightweight mid layer that slides under a shell or winter jacket and brings cozy warmth. The 100% polyester fleece is made with CiCLO technology, so if it reaches a biologically active environment at the end of its life, microorganisms help it break down significantly faster than conventional polyester. In milder weather, the jacket works as an outer layer. What Our Gearhead(R) Experts Are Saying:"On family outings, my kid ran, climbed and reached freely in this fleece, since the fabric is soft and flexible. It felt gentle against their skin, and it stayed on for the whole outing."