Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Perfect for my purposes.

I purchased this Packshower for it's dry-bag feature. I have a medium-sized canvas rucksack that I love but it is not water-proof and barely water-resistant; this serves as a perfect liner for that ruck. It is also very handy for gathering up enough water to completely drench campfires and carrying water to camp for filtering and purification. I was really surprised at how much even a moderately warm shower (after a couple days on the trail) improves my mood; I wish I would have gotten one years ago.