Awesome day pack.
I use this pack a lot. For summer day hikes, it is great. It weighs almost nothing when empty and can hold everything you need. I often will carry a 2L hydration system, light layers as needed, and snacks. The design is great. The small top mesh pocket can hold some essentials and the hip belt pockets are great for snacks (e.g., apples, Clif Bars, etc.). I use this for trail running peak bagging too when I know all I need is some water. It can compress down tight against your back for when it is mostly empty or expand outward nicely for a long day hike requiring some layers, food and water.