evo.com | Outdoor Research Activewear Tees > ActiveIce technology sounds like marketing spin until it kicks in on a scorching climb, the fabric actually cools as your body heats up. The Outdoor Research ActiveIce Spectrum Sun Hoodie backs that cooling treatment with UPF 50+, a quick-drying stretch poly blend, and thumb holes that keep sun coverage locked in from trailhead to summit. Center Back Length 71.1 cm / 28.0 in Weight 9.0 oz/ 255 g bluesign(R) approved 94% Polyester, 6% Spandex Thermo-Regulating Cooling ActiveIce(TM) Treatment Breathable, Quick Drying, Wicking | Outdoor Research ActiveIce Spectrum Sun Hoodie Men's 2027 - Small Green | Spandex/Polyester