I am curious as to why wool is not considered vegan-friendly. Not a criticism of the life choice so please don't take it as such. Shearing wool is much like getting a hair cut and since wool never quits growing it is actually inhumane to NOT shear the sheep and can threaten their life and health: http://www.cnn.com/2015/09/03/asia/s...-wool-shearer/

I do, however, agree that the warmth to weight ratio of wool which is great for base layers and socks, is not great for a puffy-type layer, but reading back you were interested in something for under a rain jacket.