Instruct: Classify the given review into positive or negative sentiment.
Query: Excellent pair of jeans.

I love my jeans. Excellent quality, mine is made in Mexico. Very comfy. The color is nice, just as advertised. Worth noting that this jeans is made of very thin/light fabric, perfect for the summertime. I have another blue pair of 501 jeans and its fabric is thick/heavy more suitable for winter. I was wondering next time I want to buy a pair of 501s, how to know what fabric they are made of?