Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great sunglasses!

I've had these sunglasses for about 5 years now. They're light, comfortable, have great visibility, and are very aerodynamic. After 4 years of intense use (camping & hiking, dropping them, etc.), the frames were in great condition. The polarized lenses began to kind of rub off, but that's to be expected from such wear and tear. Lost the 5 year old ones while camping, and these are so great, that I'M BUYING THE SAME ONES AGAIN (black frame, blue lenses) to replace them.Sum up: blocks sun well, VERY lightweight, very comfortable, and pretty durable.