The Alpinestars Racer Semi jersey is a motocross jersey that features many technical upgrades suggested by Alpinestars' sponsored professional riders. It is designed to improve comfort and performance. The jersey has a single-piece construction that is lightweight, durable and moisture-wicking, and overlock stitching throughout. As you would expect from an off-road garment, the jersey gives plenty of room for movement, but the stretch collar and cuffs ensure a comfortable fit. The jersey is also cut longer at the back to fit better with the matching pants.