This is the original flexible arch support made famous by Birkenstock. Extremely popular, it is anatomically shaped to provide long term support and comfort. Best used in any type of non-Birkenstock footwear with a heel height of 1 inch or less. High sides, contoured arches and a deep heel cup help to relieve heel pain and plantar fasciitis symptoms for many of our customers. The lining absorbs moisture and is hand-washable, while the flexible cork base provides necessary support for all the arches in your foot. Available in 3 widths, with “regular” being the most wide.