DYNA Wrist Brace Reversible LongDYNA Wrist Brace Reversible Long PRODUCT DESCRIPTIONS Wrist injuries are typically caused by one of two reasons. The primary cause is due to repetitive use of the wrist. This causes strain on the tendons and nerves that support the area, which leads to wrist pain. The other common reason is due to impact, usually during physical activities. Our natural reaction when falling is to put our hand out and land on our wrist, which can cause wrist fractures