Birkenstock Boston Grip Slide Sandals These were a store display, so may have been tried on. Please zoom in on pictures for the best detailed description of condition. The Boston Grip Slides are a timeless and comfortable option for year-round wear. These classic clogs feature a durable rubber grip sole and a subtle patina made from high-quality, soft natural leather. Perfect for a casual and stylish look. Material Upper: Natural Leather Footbed Lining: Suede Sole: EVA; Natural Rubber Details Anatomically Shaped Cork-Latex Footbed Strap with an Individually Adjustable Metal Pin Buckle Made in Germany