Our products are primarily made from High Density Polyurethane (HDPE) Plastic. Our components (hinges, locks...) are made of stainless steel or aluminum. We chose these materials because they do better outdoors, and they last longer than most other materials in coastal areas.
HDPE is one of the most commonly used plastics for outdoor uses. It is commonly used in playsets and outdoor furniture because they are proven to last longer and stay looking better than any other plastic on the market.
HDPE plastic is also very easy to clean due to it being non adhesive, meaning nothing can stick to it including paint, grass stains, and any plant growth.
Stainless steel is one of the best metals you can use for outdoor components. It lasts longer and it stays looking better than most other materials available. We aren't saying it invincible by any means, but it does last longer than almost anything else you could by.