The Ozone undersuit trousers have been developed to be easy to get on over the arctic legging and to offer exceptional comfort and protection during the dive. The trouser leg opening has a slight "boot-cut" so that the trousers can be donned over footwear and worn over the top of boots. A slight "break" in the knees gives greater ease of movement. Low profile D-ring belt, is comfortable irrespective of what is worn underneath.