Three layer suits with YKK zippers. These suits are made with polycotton twills to make the suit breathable. It comes with elastic for the thumbs and for the feet. This is because it stops the sleeves and the ankles from riding up. It also has a zippered chest pocket to place valuables in and zippers on the ankle that fit over a boot. The material is designed to be as thick as a bee sting. When looking for sizes it is best to start 1-2 sizes up from the size shirt you wear normally.