An indispensable alpine midlayer designed with stretchy, body-mapped merino wool, the Quantum Long Sleeve Zip Hood provides essential insulation and intelligent breathability for technical mountain climbs, ski tours and other high-output adventures. Designed with our BodyFitZONEâ„¢ 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 youâ€™re moving fast. The form-fitting hood adds additional warmth and fits under your climbing or skiing helmet. Underarm gussets allow for added range of motion when youâ€™re planting your ski pole or reaching for the next hold, while flatlock stitching and forward-set side seams eliminate chafing. Zippered hand pockets and a zippered chest pocket keep your small essentials secure.