I have taken this backpack for a test drive on a few hikes, and it has been a great companion. It is very light and comfortable with a lot of room and pockets. I started using it in late winter when it was still quite cold and even snowed on one of my hikes. And I used it again last week when the weather was quite warm. You really can use this pack year round. The bag is very clean inside and out and has only a few minor scratches. It also comes with a rain cover. This backpack uses Osprey's Airspeed technology which allows for great ventilation and comfort during warmer weather or fast paced activities. In addition to its assumed use which is hiking and camping, this pack is also great for travel. It is light and roomy and you can take it on the plane with you. So, whether you are going across the state, across the country, or to a whole new country, you can use this as a carry-on bag. Once you get there, find a great hiking spot and take it for a hike.