they are stiff but you can flex them a tad, the boots are made to your size.
i was going to get locking zips but didnt
the quality are amazing, i will say one boot the zip came off after one use BUT they paid for the repair, and when that failed again they refunded me and let me keep them,
but go for them
the reason they took so long to put on is they are a hard shaft boot so they are made to be a real snug fit, you are supposed to put them on standing.
one day id love to be able to walk in them, and yes with practise i think i will be able to,.
If you stick to your comfort zone then you will never get any better in higher heels