Sometimes the item you need most is the one buried below everything else. The Mountainsmith The Roo Accessory Pouch adds a small zipped compartment to compatible PALS-equipped gear, letting you give a few frequently used items their own place.
Mountainsmith lists a half-liter capacity. That is a deliberately small addition, useful for organizing a compact selection rather than trying to expand a whole daypack’s load.
Give the Pouch One Clear Job
I’d decide what belongs inside before choosing its attachment spot. A small first aid selection, headlamp and batteries, or compact personal items each make a more understandable pouch than a mixture of every loose thing in the bag.
That also makes it easier to move the pouch between compatible carriers without forgetting what it contains. The practical benefit is a familiar module, not simply another zipper to open.
- Volume: 0.5 liter.
- Attachment: MOLLE-style back panel for compatible PALS layouts.
- Access: Dual zipper pulls.
- Identification: A loop panel for a suitable patch or label.
Check the Attachment Location
The maker identifies compatible placements on several EVO packs, including waistbelt and interior positions on selected models. Look at the exact carrier, since a pouch that attaches somewhere may still obstruct another pocket or press against your body.
On a waistbelt, I’d keep the contents modest and check movement when bending or sitting. Inside a larger pack, the same pouch could work more as a removable organizer than a quick-access outer pocket.
A Small Addition Can Be More Useful Than a Bigger Bag
The Roo is worth considering when your main pack already works and just needs one organized compartment. It is a less direct answer when the whole load is too large for that pack.
I’d choose it for a small group of items you routinely need together, after checking attachment compatibility. The half-liter size encourages a useful limit: carry the things that earn that accessible space, instead of adding more equipment just because another pouch is available.
Other Options to Compare
Mountainsmith Day EVO Lumbar Pack →
Mountainsmith Day Lumbar Pack →



