Outdoor apparel specialist Patagonia has launched a limited edition parka – claimed as “the first of its kind” and retailing at US$699.

Describing the Encapsil Down Belay Parka as “an extraordinary work of design and engineering”, Patagonia said it was 100% independently baffled and differentially cut without any sewn-through seams which could leave cold spots.

The parka weighs 18oz (510g) and is insulated with Patagonia’s plasma-treated, water-repellent Encapsil 1,000-fill-power down.

Company vice president of advanced research and development Randy Harward said the product had been five years in R&D, and the company was eager to use the technology in future styles.

The parka will be sold through Patagonia’s website and in its stores in Boulder and NYC Meatpacking.