This product isn't new, but new to us: Â sheep wool insulation. Sheep wool insulation has some advantages over other forms of insulation, especially fiberglass batts. Â It stays lofted, retains R-value even when there is moisture penetration. Â It installs like fiberglass batts, but there are no masks, no off gassing, no itchiness. Â Plus the product is all natural, and there aren't the environmental impacts of making fiberglass.
There are a couple big downsides:
1--this is not a local product, and there are carbon costs associated with bringing the insulation to our neck of the woods (although bringing together the elements to make fiberglass isn't carbon free either)
2--the cost is about $2.16 per sf, which is roughly three times the cost of fiberglass, or 50% more than spray foam.