I think what you posted is what in north america are called "thermal" blankets. They are readily available. I don't use them myself. For newborns I swaddled in single or double thick flannel receiving blankets in winter, and muslin in the summer. It can be hard to find ones large enough that you can actually use for swaddling at common places like wall mart. Kushies brand has the largest I could find, and it is a pretty common brand, sometimes at walmart, sears, boutiques. Muslin in more common now, with my older babies the only place I had ever seen them was outside of canada, but now they are in baby boutiques, and even toys r us caries them. Right now for my older baby (9 months) I use a growbag.