VULKAN Neoprene helps retain heat at the site of the injury, accelerating the healing process by increasing blood flow and oxygen to the damaged tissues. This support has been designed with a unique combination of Coolmax and Airprene technology for unbeatable protection and performance.Slimline VULKAN AIRXTEND is designed with adjustable tension straps to ensure a proper fit with minimal bunching and slippage. Due to its slim line construction the support can be worn under everyday clothing for treatment and support throughout the day.*Adjustable tension straps provide custom fit for controlled compression.*Sectional design minimizes slippage and bunching.*Open heel allows for a comfortable fit.*One size fits all.