Mountaineer Patagonia's famous traverse, or train for it in your hometown, with the ultralight Millet Women's LD Fitz Roy 2. 5L Jacket. This 2. 5 layer jacket features a DryEdge All Weather laminate for waterproof breathable protection, and fully taped seams enhance waterproofing by preventing snowflakes and raindrops from seeping through. Millet designed the LD Fitz Roy with a regular fit for easy layering, and gusseted underarms keep the jacket in place when you're climbing. This jacket also features zippers under each arm for ventilated airflow, and the adjustable hoods and cuffs keep cold drafts at bay.