It's a commonly said statement that only leather shoes are forbidden to be worn on Yom Kippur. However when reading the source from the Gemara it appears that all sandals (which I imagine are the only shoes available at the time) are forbidden to be worn. I understand that the majority of later Rabbis held that it's specific to leather shoes, but does anyone hold that it applies to all shoes? If so, who does and where do they say so?
Sephardic sources appreciated.