Atlas Brace Technologies Covert Air Brace (Black, Medium) Split-Flex Frame: Vertical flex is the Holy Grail of mobility and comfort; Our split frame helps mimic natural body movements to create the best experience possible Easy Open: All new Easy Open system allows for quick, repeatable entry and exit with a simple push of a button, in any weather condition Chest Suspension: All new long travel front suspension features 30mm of travel (a 300% increase), and is slightly stiffer to help dampen a wider range of impact forces Spine Free: All new back supports increase contact with the body by 8% over the previous model, and avoid your spine by sitting on the surrounding muscles Sternum Free: All new chest support design is stronger, lighter, more compatible with chest protectors, and still sits around your sternum; Feather Weight (599 grams): New weight is 20% lower than the previous model