Splash mat
Definition
An entry-zone surface treatment — usually a textured rubber or thermoplastic mat — that absorbs water and reduces tracking-out at the boundary between dry and wet zones.
Splash mats are placed at splash pad entrances and exits, especially adjacent to bathrooms and concession areas, to reduce slip incidents on dry concrete that has gotten wet from foot traffic.
In a residential context, 'splash mat' also refers to inflatable backyard sprinkler mats ($30–$60) marketed as a budget alternative to a real splash pad.