What Our Gearhead® Experts Are Saying:“This hybrid insulation layer is my go-to for ski tours and multi-pitch climbs—it’s light, warm, and stretches where I need it. The side pockets stay accessible with a harness, and the whole thing packs down into its pocket for easy stashing.”Whether we're moving fast through alpine terrain or warming up at the base of a shaded crag, the Rime Air IN Hybrid Hooded Jacket keeps us comfortable, protected, and mobile. Mammut built this versatile insulator with strategic stretch zones for increased breathability and movement during high-output pursuits. Filled with Mammut's lightweight and compressible LOOPSINSULATION™, the jacket delivers warmth where we need it without restricting our range of motion. The wind- and water-repellent fabric features a PFC-free DWR for eco-conscious protection, while a fitted hood slides under a helmet without bulk. Harness-compatible side pockets, an inner chest pocket, and an adjustable hem make this midlayer a dialed choice for everything from ice belays to summit pushes.