Louis Garneau Matrix 2.0 Cycling Neck Warmer The Matrix 2.0 neck warmer is sure to provide you with all the protection and comfort you're looking for. The seamless multi-zone construction offers breathability and protection where needed. The high-precision knitting results in a thin and stretchable product for optimal comfort. The unique seam minimizes chafing for enhanced comfort. The Matrix 2.0 neck warmer is a must-have accessory for cold weather riding.