I recently bought one of these cases from Navitech for my 10.2 netbook. It's made from black Neoprene with silver grey edging. It's durable, soft, stretchy fabric will protect your netbook from scratches. The double ended zip seems sturdy enough and goes all the way down both sides so the case can be opened out flat when using netbook.
On reading other reviews a common problem with netbook covers seems to be the fit so it's wise to check the dimensions before purchase. The actual measurements of this case laid flat are 20cm x 27cm x 3cm but bearing in mind neophrene is stretchy so there'll be some give on those dimensions.
My Advent 4213 netbook fits this case comfortably without being too tight.
In summary, a great quality budget buy that does the job.