Der Konsument5 years ago+1+10Are these holes really open? If so, don't they collect a lot of dirt that you can't get rid of?Show in original language (German)N0HYDR05 years ago+2+20 Helpful answerYes, they really are holes and yes, the dirt is hard to get out. But if you really see an advantage in ultra-light mice, go for it.Show in original language (German)Comment