The Women's R4 Jacket is made of Patagonia's aptly named R4 fabric, their warmest fleece material. On the outside this mid-layer may just look like a super comfy fleece.... and you're not wrong, but under the surface it is packed with all kinds of technical features. So don't solely judge it by its cover. The R4 material is comprised of 3 layers: a Polartec Windbloc polyester with windproof laminate sandwiched between a high-loft exterior and an R2 grid interior. The collar is lined with soft brushed tricot for next-to-skin comfort, and the fit is closer and more technical with elastic in the cuffs and hem for more mobility and coverage. So yeah, it's a super comfy fleece, but there's a lot going on behind the scenes to deliver the coziness that you'll appreciate.
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