The Birkenstock Women's Zermatt Rivet is a cozy, elevated house slipper that pairs the brand's legendary cork-latex footbed comfort with a refined decorative rivet detail, making it the kind of warm, supportive shoe you'll want to live in all winter long — and one polished enough to wear out the door for quick errands. The upper is crafted from soft genuine wool felt, naturally insulating and beautifully textured, while a fully lined genuine shearling interior surrounds the foot in plush, breathable warmth that wicks moisture to keep feet comfortable rather than clammy through long days at home. Signature contrast stitching and a polished rivet accent set the Zermatt Rivet apart from the standard Zermatt, lending it a thoughtful, finished character. At its heart is the original Birkenstock.