Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Rainproof/Expandable

Returned from a trip to Disney. It seriously rained the whole drive down and not a single drop of rain entered. Definitely waterproof. It also is expandable which I did not realize. I was worried about the capacity but was able to expand it. It fit a large suitcase, 3 medium suitcases, and a small one. It fit more loose bags also. I believe it is worth the money. I paid less for this Rola cargo bag than I did for a waterproof backpack. The Rola is an awesome product.