Wool, and get rugs with deep colors and heavy patterns so that they hide all kind of sins.

Thanks Tibbix. I forgot to ask....

What is the recommended material for a bathroom? Would that also be wool? Not for stepping out of the shower, but decorative (where it may get some water....)

Definitely NOT wool in a bathroom.

I'd put an indoor/outdoor rug in a bathroom. You want one that dries quickly when it gets wet and won't trap water underneath it thereby creating mold and damaging the floor.

Plow & Hearth has a very nice selection of indoor/outdoor rugs.

Also, the problem with a wool rug in a bathroom isn't so much wet feet, per se. For instance, an authentic Oriental, i.e.: wool, silk, etc., works fine in front of an entry door, where it can get wet. The problem is that the AIR in bathrooms is damp, and bathroom floors tend tone tile, so when they get wet, they stay wet, etc. It's the saturation of dampness in a bathroom that makes natural fibers difficult for bathrooms.

When looking at wool rugs, check for shedding. They tend to do that.

I threw out a beautiful wool rug. The thing was forever shedding and I had dust bunnies galore. No more wool for me

When winters are approaching we generally require coziness in our rooms which can perfectly be achieved through a shaggy rug. Generally made from polypropylene material they are extreme soft, luxurious and durable as well. But if you are looking for an Eco-friendly option then New Zealand wool made rug would be the best.

Here is a link that might be useful: TheRugShopUK