The production of wellies involves a range of materials and techniques. Traditionally, wellies were made from natural rubber, which was harvested from rubber trees and then processed into a durable, waterproof material. However, in recent years, many manufacturers have turned to synthetic materials, such as PVC or polyurethane, which can be more cost-effective and easier to produce. The manufacturing process often involves techniques like injection moulding, dip moulding, and vulcanisation to create the distinctive shape and properties of the wellington boot. Additionally, there is a growing demand for sustainable and eco-friendly wellies, which are produced using recycled or biodegradable materials, further reducing the environmental impact of this iconic footwear.