Rick, I think Nick means he wants conversions to ounces and degrees F.
For the computer challenged, recommend the pocket size Carpenter's Helper by R.S.Wood of Liberty, Maine, USA.
For grams to ounces multiply times .03527.
So 830 grams for the midsize = 29.27 ounces.
Guess carpenters don't convert temps much, but one degree C. (celsius or centigrade) = 33.8 degrees F (Fahrenheit). The fact that they rated it one degree C above freezing suggests that it probably won't keep most people warm at freezing.
The Montbell Spiral #3 is rated at 30 degrees F and weighs 20 oz. That and the super version have both been reviewed here. You might want to take a look.
I've had good luck with mine so far - no clumping or loss of loft, but not washed yet.