Polyethylene is a synthetic polymer material made from ethylene monomers. It is a lightweight and durable material that is commonly used in packaging, bags, and ropes. It is also used in the production of protective gear like helmets and vests. Polyethylene is resistant to moisture, chemicals, and UV rays, making it a popular choice for outdoor applications. It is easily recyclable and can be melted down to create new products, making it an eco-friendly option.