Featuring SmartFlex: Flexible pads that harden upon impact to absorb force and then immediately return to flexible state. New pre-curved SmartFlex pad provides a flexible, ergonomic, and secure fit. Extended coverage in critical areas for added protection Breathable compression fit fabric on the front and back body panels offers 4-waystretch functionality for enhanced mobility Slim-fit base layer designed for comfort and performance New feature: Inner gripper at the body hem helps keep the garment securely in place Multi-panel design for superior fit Machine washable X4 MTB Short Sleeve Shirts boast G-Form's re-engineered SmartFlex technology, now reshaped and pre-curved for an ergonomic, flexible, and secure protection at the shoulders and ribs. A slim-fit base layer with breathable compression mesh offers a comfortable and natural fit, while the inner gripper at the hem keeps the shirt in place. Fully machine washable, X4 is more than just safety gear, it is about pushing boundaries, unlocking potential, and riding with confidence.