Ruff Wear's Approach Pack II is a multipurpose dog pack suitable for daylong trail outings and overnight summer trips. This medium size pack has 906 cubic inches of carrying capacity, giving you more than enough space for treats, food, a collapsible dog dish and some pick-up bags. If you're sniffing out the possibilities of an extended-range trip and prefer the notion of a mountaineering-oriented pack with an internal hydration system, take a couple of moments to check out Ruff Wear's Palisades Pack II.