Looking for cotton blankets? Check out these 100% Egyptian cotton blankets at Amazon. You have to have a little patience; they’re out of stock in most of the (very long) list of colors, but at last peek they still had at least 5 different colors in stock to choose from. It looks as though only twin size is left, but those twins are just $6.99 apiece.
I use polarfleece blankets on my kids’ beds in the winter, but a cotton blanket like this is ideal for the warmer months. Or, I suppose, under a bunch of other blankets in the colder months. Either way.