You live according to the maxim work hard, play hard, and winter doesn't change a thing. Whether your work takes you outside or your play goes far beyond the confines of a gym, stay warm, dry and sunburn free in the Arc'teryx Men's Long Sleeve Cyclic Zip Neck Shirt. The thermal Phasic SV front offers greater warmth for your core, while the lighter weight Phasic AR back provides the delicate balance of insulation and ventilation. Both fabrics have built in UPF 50, as well as encapsulate silver ions to minimize odor build up on the shirt. A quarter zipper neck coupled with the mid height collar provides air conditioning or a shade of neck warmth when the sun goes down. You sport a sleek profile in this technical top thanks to a trim fit. When used, thumbloops keep your sleeves down for enhanced warm no sneaky breezes climbing up your arms after a long run.