My wife calls this the most unbackpack backpack and I agree. It has nothing to do with work and everything to do with lifestyle. It’s extremely lighweight, has no structural support and packs away in its own pocket. I’ve been using mine with consistency for well over 5 years. Great for a day hike or picking up a few groceries. When empty you will barely know you have it and so glad when you need it. The main compartment is 17L with an additional zippered pouch on top. Two side mesh pockets for beverages and a front panel bungee cord to secure some add- ons. Come in the one color option shown and costs between $35-44/ea pending on qty. Durability has been excellent and I continue to get great use. Highly recommended and RAD Approved!