A Neoprene Case is a good, and inexpensive case for carrying your Netbook, Tablet, eReader, and thin devices and things like books when you are out.
You can usually get one for a dollar or more from Amazon, eBay, or even your local dollar store.
I like Neoprene cases because they are pretty durable, and made from soft and stretchable materials, so it will keep your netbook and other thin devices clean and protected from scratches, and scuff marks.
Neoprene cases also comes in a bunch of sizes like 11 inches and bigger. When you are not using them, you can also easily put them away in your purse, school bag, drawer, and other place because they are flexible, and small.
Most Neoprene cases are also easy to open and close since its top is easy to open, and close with one hand.
For less then a few dollars, you can use a soft, flexible, and durable Neoprene foam Case to protect your devices from scratches dents and other types of damage. I use one to protect my 7 inch eReader Tablet on a daily basis.