Absolutely! A snag in a knitted garment is really just a string that is pulled taught and is absolutely fixable. If you are able to pull the string through to the backside of the knit, that is a quick fix. If you are a little more adventurous, you can try and restore the original tension of the knit by using a pin to gently pull the thread horizontally and distribute it back into the knit of the sweater. Hope that helps!