Osprey Poco

By Activity

• Hiking: can hold a water reservoir and available in different torso sizes for right fit
• Climbing: narrow profile, abrasion-resistant reinforcements
• Traveling: pockets or compartments for organization, carry-on size

Capacity

• Packs that hold 20L or less are best for runs, day hikes, mountain biking or short trips.
• Packs between 20–35L are great for longer day hikes and as a travel carry-on.
• Packs holding 35–50L work for extended trips and mountaineering or climbing that calls for extra equipment.

Fit

The right daypack fit offers:

• A size appropriate for your torso length (not your overall height)
• A comfortably snug grip on your hips

Choose a gear capacity 

• Runs under 2 hours: 2 liters 
• Runs 2-3 hours: 2 to 6 liters 
• Runs 3-6 hours: 4 to 12 liters 
• Runs over 6 hours: 6+ liters 

Decide on bottles and/or reservoir 

• Most vests are compatible with both bottles and reservoirs. 
• Bottles are easier and faster to refill, usually holding 500 ml of water each. 
• Bottles can be soft or rigid. Rigid bottles are more durable.  
• Reservoirs hold more water, up to several liters. 

Get the right fit 

• Follow the manufacturer’s sizing guidelines. 
• Choose a snug fit. (Measure your chest while wearing your sports bra.) 
• Leave room for adjustment: The straps should sit in the middle of their adjustment range. 
• Women-specific vests offer fits optimized for the bust and shoulders.