High Quality Soccer Goal bottom frame is made of thicker heavy-duty steel with black baking paint to avoid rusting. The flexible fiberglass bow is highly flexible and acts as a good cushion. Soccer net is made of strong knots nylon to ensure that hard impacts will not damage the net. Ground stakes are provided to hold the net in place to ensure that it remains stable and avoids tipping during use. Quick Set Up Soccer goals for backyard, No tools required, this soccer net can be set up in less than 5 minutes. The soccer net is pre-threaded onto the bottom support bar and does not need to be dismantled, simply stretch the bottom iron bar and thread on the fiberglass bar to use.