The best insulation for cold days: 100 to 200 grams will be best on cold days below 20°F. The best insulation for extreme cold: In Arctic conditions, wear a glove with between 200 and 400 grams.Click to see full answer. Also to know is, how much Thinsulate do I need in my gloves?And the less insulation you actually need – so you don’t sweat in your gloves. Generally, 80-100 GMS (grams per square meter) is good for temperatures down to around 20F. You’ll want 200 gram Thinsulate™ for temperatures colder than that.Secondly, how many grams of insulation do I need for boots? 400 Grams: 400 grams of insulation will work for mildly cooler days with moderate or little activity. Boots that are between 400-600 grams are also good as work boots. 800 Grams: A boot with around 800 grams of insulation is for cold days roughly between 30 to 40 degrees with light activity. Similarly one may ask, how many grams of insulation do I need for a jacket? The fill weight is the measurement in grams of all of the insulation in a jacket. This measurement clearly signifies how puffy and warm a particular down jacket is. Generally, a down sweater style jacket, which is intended for use as a midlayer or active outerlayer will have between 60 and 100 grams of insulation.How warm is 200 grams of insulation?200g insulation, rated to -25°F/-32°C: The majority of our winter hiking boots and work shoes and boots offer 200g of insulation. This amount provides a barrier between you and the chill without adding too much bulk. It’s ideal for a higher level of activity, like hiking.