The New Columbia Heavyweight II Long Sleeve Half Zip (Graphite/Acid Yellow Stitch) Men's Long Sleeve Pullover, male, Apparel , Top , Long Sleeve Pullover, XL, true, You're in the big leagues now. Beef up your cold-weather training kit with the Heavyweight II Half Zip baselayer for performance layering. Performance Fit is a body-mapped design contoured to move with you. Omni-Heat reflective lining: