Zermatt Shearling (Anthracite) Size:45 ReactX foam is engineered to

ReactX foam is engineered to reduce its carbon footprint by at least 43% in a pair of midsoles due to reduced manufacturing process energy compared to prior React foam

mid-weight half zip keeps air flowing from first to last mile

The surface pattern replicates the feeling of a massage therapist's hands

Created from recycled coffee grounds

Zermatt Shearling (Anthracite) Size:45 ReactX foam is engineered toThe BIRKENSTOCK Zermatt is our first true slipper. It features our iconic cork latex footbed, and to keep you extra cozy, its fully lined in genuine shearling that will keep your feet warm all winter long. The upper consists of soft genuine wool. Anatomically shaped cork latex footbed lined with shearling Upper: wool felt Footbed lining: shearling Sole: latex Details: Decorative stitching Made in Portugal