The Altair Insulated Jacket features HydroBlock Sport 10K/10K waterproof and breathable fabric with synthetic insulation: 220 g/m² in the body, 180 g/m² in the sleeves, and 80 g/m² in the hood. It includes an I-Grow™ Extended Wear System, a working compass, Full-Motion™ articulation, an attached hood with a stretch inner gasket, fleece ear and chin warmers, fleece-lined collar and elastic cuffs, and YKK zippers. Additional features include an interior windguard, integrated clips for mittens/gloves, an adjustable water-resistant powder skirt with an elastic hem, reflective details, a cargo pocket, and an accessory ring.