Butterfly opening? I had one for a travel razor and they left me very unimpressed -easily clogged and loose razor inside so ultimately dangerous. The Merkurs are far better quality.
Maybe my limited use, or lack of experience with more sophisticated options, but this has never come loose and doesn’t clog too badly. Haven’t had any issues the last couple of months with it but I only shave the neck each week or fortnightly.
Yea sorry. Mine’s this and so far I still have a neck but it has no fluff on it.