Its from mothercare its the hypoallergenic one. I got it home, got it out the packaging then realised its 50%polyester. I rang the customer care line and they said it will be ok as I'll have a cotton cover over it and that unless DD is actually allergic to polyester it will be fine. But I don't know what DD is allergic to, all I know is that I was advised to keep her clothes and bedding cotton because of her excema and psoriasis, I assumed hypoallergenic meant it would be cotton!
I actually noticed that the grobag she has used this and last winter is the same, cotton cover but polyester filling so maybe it will be ok? Wish I'd just read it before opening the packaging.