Greenprene® is a sustainable, insanely warm, super stretchy, ultra-durable insulating foam that provides excellent UV resistance. Greenprene® is also significantly lighter in weight than traditional neoprene materials. Greenprene® is 100% neoprene free sustainable insulating foam. It has been tested and is approved by the United States Department of Agriculture (USDA) Bio Preferred® program as a USDA Biobased product. Greenprene® is formulated from deproteinized natural rubber along with other natural additives such as sugar cane, plant oils and oyster shells. The result is a sustainable Bio Based insulating foam that is ultra-soft, stretchy, durable and light weight. Greenprene® wetsuits will allow you to move freely without restriction while keeping you warm and comfortable in the most demanding conditions.