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Flak Sack

The Flak Sack™ by the Loctote® Industrial Bag Co. is the toughest drawstring backpack ever. Made with a double layer of heavy-duty slash-resistant fabric, this lockable bag is like a portable safe for your valuables. It was designed to accommodate the lifestyles of people on the go who need their essentials with them, but are not able to be constantly looking after them.  Simply lock the bag closed or to any secure object – and leave it without worrying about it being tampered with or stolen. This bag doesn’t just carry your belongings, it protects them.
    • Double Layer of UHMWPE fabric that's extremely slash, abrasion & tear resistant
    • Patent-pending steel reinforced locking strap
    • Heavy-duty solid brass lock
    • Water Resistant Coating
    • RFID Blocking Interior Pocket
    • Secure Sternum Strap


This is the bag that everybody, at some point in their life, wishes they had.  Elegant in its simplicity and unapologetic in its brutal effectiveness. Sometimes you just need a safe place to put your personal items and valuables while you focus on something else. Our purpose for creating this bag really is that simple.

When you start with a blank sheet of paper you get to re-think everything. That’s what we did with this bag. We considered the best way and the best materials each step along the way. We did things to test our bags that didn’t make our moms proud (and possibly violated a few city ordinances). Good enough wasn’t good enough. We saw beauty in strength and elegance in simplicity. We got in touch with our softer side, and we kept innovating until we got it right. At the end of it all, we created a product that we think will blow your mind. 

Customer Reviews

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Joey R.
United States


very happy with purchase it is a lot more durable feeling than you can imagine from just watching video reviews or seeing pictures , materials feel substansial , may have a trip in the recent future and can use the peace of mind

United States

The "bag" to have!

Great protection for Personal Internal Information while traveling. Protect your belongings and be worry free. Can not tell you how many times I have gone to the beach and my wife carries her tote and the moment we turn our back is like inviting a thief to take our life. This bag uses a high strength hidden drawstring and we simply loop and lock it to a bulky large beach hotel chair and it locks closed tight. Now my wife and I can relax and enjoy the beach without worrying about our belongings being taken. We use a more high strength tungsten latch lock with a key and tie the key to my swim trunks. I tested the bag with a buck knife and I could not get the bag to open. High strength tightened fibers make this bag impenetrable. BEST beach travel tote bag EVER!!

Daniel M.
Mexico City

Great product and service!

Product: I find this product very useful for travelling, the materials feels strong and resistant. I´m totally happy with it. Service: I had a very quick response from the team to solve my doubts, the product arrived in time. I really recommend it!

United States

Loctote buy

I really like this bag. I bought it for my husband for work, to carry his essentials because he was feeling that a full sized back pack was a bit too big. He too really likes it, except for the fact that he wishes it had another pocket, more assessable, on the outside of the bag. I understand that this would kind of defeat the purpose of locking everything inside, but maybe for casual travel, the outer pocket could provide a place for instant cell phone / wallet / sunglasses access, without having to fish around in the entire bag. It may not be the right bag for work because of this fact, but for leisurely travel, it may be the bomb!

New Zealand

Excellent Product and Delivery

Loctote Flak Sack is lovely and delivery to New Zealand was efficient. Many thanks

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