I have to admit, there are times when my casual look consists of old sweats and t-shirts. But casual doesn't have to be sloppy; there are far too many cute options out there.
Joggers for instance; they are insanely comfortable, but stylish at the same time. There are so many options out there these days, Joe Fresh and Old Navy both have nice ones currently.
If you go with a skinny fit, you can wear a looser Boyfriend style t-shirt. If your joggers are a looser fit (like mine), pair them with a fitted top (I chose a striped crop, long enough to almost cover me up).
Now that the weather is getting cooler, joggers are a nice alternative to jeans, when you're looking for a casual yet chic outfit. Add some sneakers or slip-ons (like my faux leather ones) or even a pair of heels if you really want to elevate your casual look!
Joggers from Gap
Top from Sears
Shoes from Kohls