UKC

The Northwall Jacket is our go-to soft shell made for cold conditions. The jacket is built with a Regulator R4 grid interior and moisture-shedding Polartec Power Shield fabric, which is highly breathable, provides great stretch, and has a high warmth-to-rate ratio.

Read more at http://www.ukclimbing.com/gear/news.php?id=4069

"High warmth-to-rate ratio".....? Is that similar to high warmth to weight ratio? At 731g I wouldn't say it does. Power shield is heavy, but it defiantly will be warm.

In reply to UKC Gear: R4 ? Patagonia seem to think its R2...
http://www.patagonia.com/eu/enGB/product/mens-northwall-jacket?p=83260-0-26...