Zermatt Ecru Wool Felt Men's The Aetrex insole features UltraSky™

The Aetrex insole features UltraSky™ cushioning to provide pressure relief & extra comfort

An adjustable backstrap creates the perfect fit

Evafoam™ cushioning

The synthetic Birko-Flor upper is skin-friendly and hard-wearing with a nubuck look whose texture and color are akin to real leather

Zermatt Ecru Wool Felt Men's The Aetrex insole features UltraSky™The BIRKENSTOCK Zermatt is their first true slipper. It features their 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