Fox Racing - Raceframe ImpactLow profile roost deflector with D3O armor The Raceframe Impact Soft Back Guard is Fox Racing's top level chest guard which can be worn over or under the jersey. Its low profile and articulated design and features fit snugly to the body, ensuring you have full range of motion while riding. The rugged D3O armor is built to absorb impacts without restricting motion. With extensive laser perforated venting, you'll stay cool with increased breathability