All FEIT shoes are fitted with a bamboo shank stabilizer in the midsole. It is one of the strongest natural materials in the world. Bamboo is used for its’ inherent strength-to-weight ratio being as strong as steel and almost twice the compression rate of concrete.

Bamboo is a grass, not a tree. It produces a yield 25 times higher than that of timber. With selective annual harvesting it can regenerate completely without the need to replant, making it one of the most renewable sources on the planet.