"What Our Gearhead® Experts Are Saying:""This jacket is the definition of versatility. The waterproof shell keeps me dry on wet hikes, while the insulated liner adds just the right amount of warmth in colder conditions. I love that I can wear them separately or together depending on the weather. The underarm vents are a must for breathability, and the adjustable hood and cuffs help dial in the fit. It’s an all-season essential for any adventure.""The Mammut Alto Light 3-in-1 HS Hooded Jacket is built for unpredictable conditions, offering adaptability for year-round adventures. Whether we need full weather protection, lightweight insulation, or just a breathable rain shell, this versatile system keeps us covered. The outer shell is made with Mammut DRY technology, a waterproof and breathable 2. 5-layer fabric with a PFC-free DWR finish, ensuring we stay dry through rain and snow. Adjustable features—including a one-point hood, underarm vents, and a drawcord hem—help us fine-tune the fit and airflow for changing conditions. The removable inner jacket features zoned LOOPINSULATION, made from recycled materials, delivering targeted warmth with a lightweight feel. Worn together or separately, the Alto Light 3-in-1 Jacket is the ultimate layering system for hikers, trekkers, and outdoor explorers."