RaceX Classic Half Zip is the original Swix shirt. It is a versatile baselayer with durable material that is perfect for both low and high-intensity training. The slim-fitting baselayer offers excellent stretch for freedom of movement. The material is quick-drying, lightweight, and breathable. The neck zip allows for temperature regulation. The main material is 70% REPREVE® recycled Performance Fiber, made from plastic bottles collected from coastal areas lacking formal waste or recycling systems.Features:- Slim fit, with zipper at neck opening for quick and easy ventilation.- Stretch cuffs at bottom hem sleeves for great comfort.- High stretch function for optimal freedom.- Quick dry performance.- Main material is made with Repreve® Our Ocean recycled fiber.- The perfect synthetic half zip baselayer for cross activity, all year around.Composition: 70% Polyester Recycled Repreve® Our Ocean, 30% Polyester.