The Oral-B Floss Preoexpert Premium was me effective advertising recommended by my dentist. There was to separate some small test packets with 50cm flossing. The result is overwhelming and is achieved by either an other Oral-B still a NoName floss or rather a tooth belt. The soft wide toothed belt slides effortlessly into the tightest interdental spaces, cleans the place well and easily and hardly hurts at the gingival papillae. The toothed belt does not fray and is pleasantly flavored with mint. Only the Superfloss cleaning threads with fleece clean more thoroughly, but slide it not so good in tight interdental spaces.
If you conserve the product bypasses (no 50cm sections, but rather 30cm sections use), then submit the 4 donors an eternity and the high price is soon forgotten. Too bad that there is not the product even in the drugstore with two capital letters.