Layer up in the Boys's Capilene 4 Expedition Weight Zip Neck from Patagonia when winter turns snarly. This full-zip is Built to make regulating your internal climate easy when you're on the move. Streamlined "barely there" seams cause no chafe while providing a tailored, trim fit. An angled, low-profile zippered chest pocket holds lip balm or MP3 player and can be easily accessed beneath bibs, waders or pack straps. The Additional tail length keeps the heat in and the elements out. Made of 50% recycled (and 100% recyclable) polyester from Patagonia's Common Threads Recycling Program, with a Gladiodornatural odor control Complete. Imported. Common Threads Recycling ProgramResearch shows that the environmental impact of recycling worn-out Capilene base layers into new polyester fiber is significantly lower than making that same fiber from virgin materials. Taking into account that worn-out garments are diverted from trash incinerators, making new polyester fiber from recycled garments results in an energy savings of 76% and a CO2 emissions [greenhouse gasses] reduction of 71%, versus creating that fiber from new raw material. Capilene Core PerformanceCapilene base layers afford quick-drying, next-to-skin moisture management for all activities in all conditions ? from high-altitude bivies to sun-soaked H2O sports.