Purchased an All Seasons Duvet 18 months ago best duvet we have ever had. One duvet is 200grams the other is 300grams it is Sunshine Wool which can be machine washed saved a lot of expense at the dry cleaners! When we first took them out of the storage bag they arrived in I was a bit worried about it being 'thin' I couldn't have been more wrong the way the duvet falls over you keeps you warm all over unlike big puffy duvets which have cold spots. The fact each 'square' is stitched stops the wool from moving and also helps add to the evenness of the temperature while under the duvet. I couldn't and wouldn't sleep under any other duvet now. Without a doubt a 5 star product.