Neoprene material is known to provide the highest heat retention and insulation of any material. Unlike elastic braces which can stretch only in two directions, neoprene braces can stretch in four. Neoprene's unique characteristics allow it to support your knee without bunching up and maintains its shape. Neoprene usually lasts longer than standard elastic braces. Many athletes use this type of brace in cold weather sports, such as skiing and ice skating.
ACL injuries typically occur in association with a sudden twisting or deceleration activity, and sometimes with a direct blow to the knee.
Polychloroprene is usually referred to as Neoprene. Neoprene is used in many sports medicine and orthopedic applications.
Some of the outstanding properties of Neoprene include resistance to sun and ozone damage as well as other weather conditions. It also stays useful over a very wide range of temperatures and conditions, while retaining it's physical properties. Neoprene is also water resilient and is available in various densities.