Can you own too many Birks. Yes if have a pair of Noppyflex sandals. Instruments of pure foot torture as Birkenstock choose to use hard plastic for the foot bed unlike similar
Reflexology Sandals Provide Feet With Good Pain Feeling - WSJ
Tim's sandals
Remember Noppy Flex and Super Noppy? Birkenstock should bring them back, I would love to buy them... : r/Birkenstocks
Birkenstock Noppy Massage Sandals Brown Leather Mens Sz 8.5 us | eBay