The men's heavyweight HALF ZIP is part of the Asics x Reigning Champ Vancouver Edition collaboration, a series of running shoes and apparel with urban style and performance features. The half zip top features seamless construction, eliminating abrasion points. It's a four-way stretch that conforms to every twist and turn you make running the streets, trails or tracks. Flatlocked seams create a smooth inner finish. Thew shoulders are pushback, and the zip is a reverse coil.