AIRSTEP IS ONE OF A KIND! Built on the registered FreeStrideTM last, Airstep is made in South Africa from quality materials. Extra depth with proven offloading qualities. German laboratory pressure testing shows a maximum pressure of 29Nm, well within targeted tolerances. Extensive wear trial testing during prototype development. Tested and approved by Telmo Applied Science, an independent footwear assessment body. Endorsed by leading Podiatrists, Endocrinologists, Orthotists, Diabetes. SA, Diabetes Alliance and Sweetlife.