I got this dress and this one and love them! They are 100% cotton, simple, comfortable and cheap. Nice and long too, brushing my feet at 5'6" 
I am sure they won't be to everyone's taste, I am a comfort hound much more than a style hound, so no need to comment just to say EWW FRUMPY or whatever. Just thought I'd share for those of us who like a nice easy throw-on-and-go thing in natural fibres 
Also bought these sandals and love them too, they are leather and v comfy