The Impulse 1/4 Zip Top by The Northface is a running garment to envy! VaporWick fabrication minimizes moisture and antimicrobial treatment minimizes odor. Flat-lock seaming throughout provides comfortable, chafe-free wear mile after mile. Rear stash pocket and reflective treatment are an added bonus to this stylish running garment. VaporWick Moxie Jersey: 90% polyester/10% elastane. VaporWick Moxie VentAir: 93% polyester/7% elastane. Imported.