Check the listing for details. Alpinestars Bionic Neck Support Brace Tech 2 XS-M Black/Gray. Condition: New with tags. Listed at 309.95 USD. The Bionic Tech 2 is constructed from an advanced high-performance fiber polymer compoundComplete design facelift and technical upgrade including new lightweight rear and chest padding and updated chinplate designStructural integrity and frame strength against heavy impact energies during a crashUltra-lightweight performance and comfort while ridingLess weight than its predecessorsResilience to low temperatures, below 0°CDesigned to provide a customizable, secure and personalized fit with the SAS (Size Adapter System) for a versatile fitThe stretch fabric laminated foam padding kits are adaptable and the interchangeable EVA foam pads allow compatibility wit body impact shield systemsLightweight strap System can be worn over or under the jerseyIncorporates a bio-organic engineering design for superb ergonomicsRear stabilizer promotes PFR (Progressive Force Relief) and dissipates energy loads by transmitting them across the back and shoulders and away from spine (thoracic vertebrae), and is connected to the frames via pivot keyFrame construction promotes improved contact with helmet during impact — including rear support edge that fits closer to the body, extra width to account for different helmet sizes and raised chest to reduce hyper-flexionInnovative quick-release locking system for rapid and efficient fitting/removal offers secure and convenient closureCompressed EVA foam compound padding to distribute the impact force over the widest area, yet remain lightweight