What is a flat object that people use to travel in surf-like position down hills of snow?

A flat object used to travel in a surf-like position down hills of snow is called a snowboard. Snowboards are designed for riding on snow and allow riders to maneuver and perform tricks while gliding down slopes. They have a wide, flat surface and are typically secured to a rider's feet with bindings. Snowboarding is a popular winter sport enjoyed by many enthusiasts.