"The Patagonia Hi-Loft Nano Puff Hoodie is the step up from the classic Nano Puff. The dual-weight PrimaLoft Silver Insulation Eco fill puts more grams where heat loss is greatest. Hip length and a fixed hood work together to close the coverage gaps that matter most on a cold belay ledge or a long winter approach. What Our Gearhead® Experts Are Saying:""I reach for this when a standard puffy isn't cutting it. The heavier PrimaLoft fill holds warmth on long belay stances where standing still is the whole job."""