The TNF Summit Cayesh GTX Pro Jacket is a high-performance mountaineering shell designed for technical alpine objectives. It's built with GORE-TEX Pro 3L fabric, making it windproof, waterproof, and breathable for harsh mountain weather. The jacket features a fully adjustable, helmet-compatible hood, harness- and pack-compatible alpine pockets, and underarm vents with AquaGuard zips for moisture management.