The Helly Hansen Lifaloft Insulator Jacket is a lightweight, do-everything insulator that works as a standalone layer around town or under a shell on deep mountain days. It&';s built with LifaLoft insulation-Helly Hansen&';s Lifa fibers paired with PrimaLoft-to deliver the warmth and compressibility of down with the reliable performance of synthetic. Windproof and treated with a water-repellent finish, it packs down small and traps heat without weighing you down, making it an easy layer to reach for all winter long. Features: LifaLoft Insulation: Lifa fibers and PrimaLoft combine for down-like warmth and compressibility. Lightweight & Packable: Highly compressible for easy stowing in a pack. Windproof Protection: Blocks cold gusts to trap body heat. Water-Repellent Finish: Sheds light precipitation on the move. Versatile Layering: Wear on its own or under a shell as a midlayer. Trim, Active Fit: Streamlined cut layers cleanly under outerwear. bluesign-Certified Fabric: A more responsible material choice.