Maximum comfort under-the-jersey design with pliable RMF roost deflection technology. Air Mesh - Perforated fabric allows air to flow unimpeded, while still providing protection from abrasion and sunlight. Race Collar Compatible - Reactive Memory Foam is soft and pliable in its natural state but hardens when force is applied to it, providing a protective barrier. Impact Pads - Strategically placed Impact Pads add an extra layer of protection in key areas. Compression fit. Breathable / moisture-wicking mesh and jersey construction. RMF Technology (Reactive Memory Foam). Chest impact protection. Meets CE 14021 standards. Designed to work with most race collars. Elastic shoulder attachment loops for race collar compatibility. Back pocket for EVS CE back protector accessory (sold separately).