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The Castelli Fly Direct Jacket is our go-to for cold-weather rides that demand warmth without the bulk. Crafted with Polartec(R) Alpha(R) Direct insulation, it offers exceptional warmth while staying incredibly lightweight and packable. The windproof microfiber outer shell with DWR treatment blocks the elements, and when temperatures shift, the Fly Direct easily packs down to stow in your jersey pocket. Reflective details ensure visibility on low-light rides, and the YKK(R) Vislon(R) zipper allows for quick adjustments on the fly. Whether it's a long adventure or just a chilly morning ride, this jacket is the perfect versatile layer.