This icon is a part of a collection of Siatka sportowa flat icons produced by Icons8. Icons follow the guidelines of iOS, Windows, and Android and are designed by a single designer, guaranteeing the consistent quality. Both PNG and vector are available.
This looks to be a net that will be used for volleyball. It could also possibly be used for badminton. There are two poles on each side and a big net going across going from the top but not all the way to the ground.