Increase of gloss or sheen of paint film when subjected to rubbing, scrubbing or having an object brush against it.
Paint heavy wear areas that require regular cleaning (e.g. doors, windowsills and trim) with a high quality waterbased paint, as it will offer both durability and easier cleaning capabilities. In high traffic areas, choose a semi gloss or gloss finish rather than a flat sheen level. Clean painted surfaces with a soft cloth and non-abrasive, neutral cleaner.
Source: The Paint Quality Institute
Aalto recommends Aalto WB Interior Waterbased Enamel Low Sheen or Flat for high wear areas such as hallways, and WB Enamel Gloss or Semi Gloss for trims.