Product details:

A stretchy slim-fit midlayer that's ideal for technical mountain adventures like climbing and skiing, the Quantum Long Sleeve Zip helps regulate your body temperature thanks to it's intelligent fabric paneling and easy layering, full-zip design. Designed with our Body Fit Zone merino-blend fabric, the Quantum features anatomically body-mapped panels of our stretchy merino terry fabric for heat retention, with merino eyelet mesh in key areas for ample ventilation when you're moving fast. Underarm gussets allow for added range of motion when you're planting your ski pole or reaching for the next hold, and zippered hand pockets keep your small essentials secure.