Where to get good fleece blankets for ducks?

[Fawkes]

I need some new fleece for my ducks. I got a couple of fleece blankets but they ended up being too small and easily messed up by the ducks. Is the fleece sold by the yard at Walmart any good? Or is there a better place, in real life or online, to get good strong fleece?

I figured a lot of you, especially the indoor owners, probably have some experience of sourcing fleece so thought it'd be worth a shot...thanks in advance!