Yes - if it is considered non-obvious (in light of previous designs, etc) and novel (i.e. never been done before). Your invention sounds patentable to me (in a hypothetical sense), but just to make clear, do keep in mind that the "invention" being patented must serve a tangible utility in order to qualify for a utility patent (most of the time you hear the word patent, it is being used to refer to a 'utility patent'). An example would be, if what you were adding to a pair of pants something that would make the pants more comfortable, or it would make the pants more useful by adding a pocket, maybe, then your invention would serve a tangible utility.
Whereas, if your invention or aspects of it served no utility beyond, say, looking good - then you would be looking at a design patent. A professionally prepared design patent is a bit cheaper than a professionally prepared utility patent. A design patent also offers a decidedly narrow range of protection, but is still useful to help prevent knock-offs.
