Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too large for bike camping or backpacking

This is a pretty good bag to sleep in, and is very well constructed. The exterior material seems very robust, but is not the most comfortable. The 15-degree rating isn't right at all; on a trip down the cool and foggy Oregon Coast, I began to feel uncomfortably chilly at around 30 degrees.However, the bag's main problem is that it doesn't pack down well -- a problem not helped by the mediocre compression sack that is included. This bag is simply too large for use on a backpacking trip or bike tour, and the space it takes up is space better used for food or water. A far better solution for any summer or fall camping would be to find a cheap down bag (30 degree down bags don't cost much more than this one) and a bulkier sleeping pad.