Thermal comfort at its finest: The Activity Jacket provides cozy warmth in every season. From January to December: With our extremely versatile, ultra-warm jacket, you can make the most of your hikes. The Polartec Thermal Pro fleece offers the pleasant warmth of a traditional fleece, while the soft material is extremely durable, ensuring the jacket looks good for a long time. The InterActive zipper allows for additional versatility, as you can wear the jacket with any waterproof product from the InterActive range for extra protection in bad weather. A practical piece to pack and take along!.