Omni-Heat technology gives this traditional half-zip pullover a hearty helping of lightweight heat so you can tackle trails without the burden of bulky layers. A thermal reflective layer is printed directly onto the back of the fabric to reflect and retain your own body heat, resulting in 20\\% more warmth for you. Rock the Heat 360 II alone or layer it under your favorite shell for the perfect heat-regulating mid-layer. Hybrid fabric technology - combining a 93\\% polyester, 7\\% elastane Heat microfleece shell and 92\\% polyester, 8\\% elastane Heat Thermo Stretch panels - offers four-way comfort stretch so it moves with you, and breathes easily to keep you comfortable. The mock-neck collar helps further protect against chilly air, while the half-zip front placket allows for controlled ventilation. Active fit. Imported.