ColdGear® Reactor adapts the garment's ventilation depending on the activity you perform. Reactor encapsulates the heat during low-intensity training and activates the ventilation during movement. The garment is fitted with brushed panels on the inside for a soft next to skin feeling - Signature Moisture Transport System absorbs sweat and keeps you dry and light - Raglan sleeves for the best possible mobility during the workout - Thumb holes encapsulate the heat and keep the garment in place . Material: -87% polyester -13% elastane.