UA Expandable Sackpack

Style # 1300203
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UA Expandable Sackpack
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UA Expandable Sackpack

Product DNA

  • UA Storm technology delivers an element-battling, highly water-resistant finish
  • Zippered main opening for easy loading
  • Interior mesh pocket zips shut for secure organization
  • Breathable mesh shoulder straps
  • Zippered side gussets add volume when unzipped
  • Webbing loops on front panel for added attachment points
  • Dimensions: 14.2" x 20.5" x 3.9"
  • Volume: 1,647.6 Cubic In. / 27 L
  • 100% Polyester
  • Imported

Review Summary

21 Reviews


Runs small Runs large


Min. Max.


Min. Max.

Lightweight and comfortble even put alot of stuff

I like it like it i like it i like it i like it Whereever whatever

  • The man and The bag

Comfortable Alternative to Drawstring Bag

Very comfortable bag with cushioning for your neck. Size is a great middle ground between traditional book bag and a drawstring bag. First a change of clothes, shoes and a couple water bottles.

These products have great results

Anytime I’ve looked for the right fit holding in a shoe or athletic wear, other brands haven’t done the best as far as fit, Especially when I come Or leave for. workout. But products like the duffle back pack have done wonders. More space and more room for my shoes and workout gear.

Great Bag

[This review was collected as part of a promotion.] This is a great alternative to the drawstring bags. Comfortable shoulder straps and great look.

Fitness performance. Compressions, tanks, footwear

[This review was collected as part of a promotion.] Have been a huge fan of the brand for years. For me it begins in the weight room and sky rockets from there. From footwear to the performance clothing, the brand has done all and then some. Order from under Armour every week and will continue to.

Love it!

[This review was collected as part of a promotion.] Very comfortable to wear (for me and my bf-I'm 5'4 and he's 6'1). Nice and light, and fits alot when it's expanded. Love the colour! (exactly as pictured). I own quite a few backpack/sacks, and this is by far my favourite.

I love it

[This review was collected as part of a promotion.] Confortable & big enough to carry gym items. Love it!

Sack pack

[This review was collected as part of a promotion.] Bought the pink color for valentines for my wife. She works out every day and I want her to match with her under armour apparel. I was surprised how durable and thick it is and now she uses it for her workout gloves, knee pads, and jump rope. If any drawback it does not have an exterior pouch for her water drink but it is a great gift add on item.


Best "sack pack" around. Comfortable to use, plenty of room. It will be much more useful than a regular sack pack. It will not only be useful as a quick overnight bag, but as a catch all bag when visiting a theme park.


I don't do a lot of reviews but this one deserves it. I purchased this for my 11 year old son. He goes though a ton of those sack bags because the strings break or the hole rips. He also complains about the straps digging into his shoulders on the regular bags. I purchased this one because of the "real" straps, and I'm not disappointed. The straps are padded along with a light padding in the back of the bag. This bag is not noticably heavier then the regular sack bags and it does have a nice zipper to hold everything inside. The pictures on the web site also do not show the zip around expandable part very well, but once it is open it probably adds about 2" all the way around the bag. This zipper when not opened also supports the weight of the bottom of the bag. I know this bag is a little more expensive then the other bags but in my opinion it is more then worth it. Whomever thought of this bag, thank you, it's perfect for my sons needs!!