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
BIRKIS Super-Noppy Synthetic-Sandals Birko-Flor Black Size 35 EU with a regular insole - video Dailymotion
Birkenstock Woman's Arizona bs shiny python Eggshell EU 37 US 6 NARROW | eBay
Found some Noppy Birks! Can't wait to try them out and adjust my feet to them : r/Birkenstocks
Birkenstock Birkis Super Noppy Massage Acupressure Sz EU 40 or US L 9 or US M 7 for sale online | eBay
Remember Noppy Flex and Super Noppy? Birkenstock should bring them back, I would love to buy them... : r/Birkenstocks