Moving in the Mountains | Technical half-zip has the performance-forward comfort needed for trail running and trekking. Motiv Aero Fabric | Highly breathable fabric wicks moisture and dries quickly through a subtle mesh structure. Regular Fit | Easy to layer under a shell or fleece while allowing freedom of movement. Microactive Raglan Seaming | Low-bulk seaming all around for bulk-free comfort while layering, and raglan sleeves keep the seams off your shoulders for backpacks. Run Ready Specs | [Material] 100% Polyester; [Fit] Regular; [Centre Back Length]; [Weight] 105g; [Closure] YKK Half Zip; Hidden Stretch Thumb Loops.