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Patagonia Mass Sling Bag Review

patagonia mass sling bag front

The Patagonia Mass Sling Bag is a messenger style shoulder bag with stability of a backpack.

The Patagonia Sling shoulder bag is a great bag for people on the go, providing the support of a backpack with a hands-free convenience of a messenger bag. It’s small and convenient and the load of the pack is distributed right behind your shoulders preserving arm and torso mobility.  To access the contents of the bag simply spin the single shoulder strap around around. Very convenient!

This bag is suited for men or women.  For women who don’t like purses but want the convenience of one, this one is a good choice. If you’re riding your bike or walking around town taking care of a few errands, you don’t have to deal with a full on backpack. The 9L (549 cu. in.) size means you can easily accommodate most of what you need in this sling shoulder bag.

patagonia mass sling shoulder strap front
Patagonia mass sling bag’s shoulder strap

Looking to buy Patagonia Mass Sling Bag?

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Optimized Shape

The load of the pack is distributed right behind your shoulders, giving you full arm and torso mobility.

Easy Access

Simply spin the single shoulder strap around front to easily reach all of your gear

Molded back panel, mesh padding

The molded back panel sheds moisture and channels a cooling airflow. The shoulder straps are padded with breathable spacer mesh to keep you cool

Padded Laptop / Tablet Sleeve

Padded sleeve fits most 13 in. laptop computers or a tablet

Storage Compartments

Main compartment opens with a side zipper and features 3 pockets inside, including a padded pocket for a smartphone. These compartments help you keep small items organized.

Reflective Panel

Exterior features include a reflective panel and lash point for attaching a light (light is sold separately)

What could I fit into it?

The sling bag can hold: an iPad, 13″ laptop or tablet. digital SLR camera, extra lenses, and a small windbreaker jacket or sweater.

I find this bag most useful for vacations or weekends. You have to keep in mind that at 549 cubic inches, or about 9 Liters the Sling bag is fairly small,  at times too small to carry many things at once.  It’s great for traveling though.  It fits surprisingly more than I thought it would.  Heading to the office I find most daily essentials can fit in here, such as my laptop, a cardigan, bike jacket, my lunch, some toiletries and a small thermos of coffee or water bottle.  For comparison, here are other small bags and medium bags.

patagonia mass sling bag front
patagonia mass sling bag with easily accessible comartments



Patagonia Mass Sling is constructed from 8.4 oz. 600 denier 100% recycled polyester with a slick 3.3 oz. 200-denier polyester lining; both with a polyurethane coating.


patagonia mass sling bag rear
patagonia mass sling bag seen from the back

Pros and Cons

Things we liked

  • Convenient access to all your gear. Simply swing it around to access your things.
  • Light: weighs just over 1 pound (around 480 g)
  • Padded laptop Sleeve
  • Three pockets inside, including a padded one for a phone, keep small items organized
  • Water resistant, stays dry in rain or snow
  • Padded and breathable strap, no cutting or biting of your shoulder
  • Looks stylish: very careful attention to detail in the design and quality
  • Great for travel, weekend use or for the office

Things we didn’t like

  • Too small to carry laptops larger than 13″ or larger notebooks and books, not always practical. Check out the messenger bag store for larger bag sizes.


Dimensions and Specifications

The bag measures:

  • 11.5″ x 10″ x 4.5″ (inches)
  • 29.2 cm x 25.4 cm x 11.4 cm

Weight: 1 lb, 1 oz., (482 grams).

Volume: 549 cubic inches, or about 9 Liters.

Number of Exterior Pockets: 2 + main compartment

Color Choices: Purple, Classic Tan, Black

Laptop Compartment: Yes

Fits laptop Size (in.): 13″

Carry On Size: Yes

Material(s): Recycled Polyester


Where to Buy the Patagonia Mass Sling Bag

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Looking for other messenger bags from Patagonia? Check out the full selection of Patagonia bags or look at other messenger bag brands.

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