Flak Sack II - Steven 2

Review: Loctote Flak Sack II

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Loctote sent me three bags to review. I will be reviewing the Flak Sack II here, but you can also check out my reviews of the Cinch Pack and the AntiTheft Sack.

When I was sent this bag that came with a way to secure the bag and the belongings inside, I was excited to give it a go.

Read on to find out what I thought of the Flak Sack II.

First Impressions

The Flak Sack comes in an off-white bag, probably to offer some protection during shipping (not that it needs it) and also to present it professionally.

Loctote Flak Sack II - packaging

I opened the bag, took out the bag inside, and checked it out.

Flak Sack II - on grass

My immediate thought was that this was a bag that I could see myself wearing in the great outdoors. It looks like a bag that you would take to the beach with you, but, as I do not live near the beach, it would be the perfect accompaniment to a lake or on a mountain hike.

One thing that I immediately liked was the size of the bag. I am used to using a backpack all the time, and that works well when I am carrying my laptop or packing clothes for an overnight trip, but it can become oversized if I want somewhere to store my jacket when I am out, or just some snacks when hiking. With that in mind, I can see myself using this bag a lot.

Flak Sack II - Steven

The straps are ropes, so that could become uncomfortable after a while, but I am not expecting this to be a bag that I’ll wear for extended periods of time with heavy loads in it.


  • Size: 18” x 14”
  • Capacity: 13 liters
  • Weight: 2 lbs


What does this bag have that others do not?


This was the part that excited me the most.

The bag is made from Flaknit, which is Loctote’s proprietary slash-resistant fabric and is rated as ANSI A9, which is the highest cut level there is. If you are worried about your bag being cut, accidentally or otherwise, then this is the bag for you.

There is a video on YouTube of them testing the slash resistance, so I did not test that myself, but I did test out the strength of the AntiTheft Sack.

Here’s the video of me slashing the AntiTheft Sack.

The steel-reinforced locking strap is patented and adds durability to the bag, allowing it to be locked securely to the brass combination lock.


The straps may look like ordinary ropes, but they are cut-resistant and prevent someone from slashing them to make off quickly with the bag. There is also an included sternum strap (leather) on the ropes that can be used to keep the straps centered across your chest for extra comfort.


There interior is reasonably large, and it is split up into smaller pockets, which is helpful when you are organizing your things to take with you.

flak sack II inside
Credit: Loctote

There is a large fleece-lined RFID blocking pocket, which stops any unauthorized scanning of your credit cards and helps to protect your identity. You also have two smaller pockets which are a good size for things like a wallet or a phone.

There is nothing unexpected here, and the interior of the bag makes good use of the space.


This is not a bag that you will take on long hikes, but it is not supposed to be. The main function here is transporting your belongings and securing them when needed.

However, the bag is not at all uncomfortable. The straps sit well on the shoulders, and they are adjustable, so you can have the bag sit higher or lower on your bag as needed. The front clasp is also a welcome addition and helps the straps to sit where you want them while also taking some of the strain off your back.

Flak Sack II - Steven 1

If you are going to wear this bag for a long time, I can see the ropes becoming uncomfortable, but they work just fine for short periods of time.

The additional benefit is that you can easily carry this bag by hand.

Flak Sack II - on a tree 2

How To Use

When you want to close up the bag, you pull on the ropes, and that cinches the top. However, that is not how the bag is secured.

Whether the bag is cinched or not at the top, you have another strap that cinches the top, and you can securely lock this strap to keep the bag closed. The first way to use this is to secure the bag when it is on your back.

Behind the leather Loctote patch, you will find the combination lock. The lock is set to open at 0-0-0, and there are simple instructions to personalize this code. Attached to that strap is a cord. When you pull on the cord, it will cinch the top. As you pull the two ends of the cord from the bag, you will eventually reach two metal loops, one on each end. You can place the lock through these loops and lock the bag shut. Now, when you are out with your bag, no one can reach their hand in and take your stuff.

flack sack ii locked
Credit: Loctote

When you want to lock it to something, simply take the length of cord that you have pulled from the bag and wrap it around a metal bar or something else. Place the lock through the two loops and the locking strap. Your bag is now secure.


Flak Sack II is a great little bag. I am not going to use this as much as a backpack, but I can see myself taking this on a camping trip. We often camp near a lake and go for a swim. I can stuff my valuables in the bag and lock the bag to something. An opportune thief is going to have a hard time getting in.

I will also use the bag reasonable regularly if I am going somewhere and do not need something as big as a backpack.

Overall, I like how it looks and the fact that it packs up nice and small, and I just hope that someone will try and slash my new unslashable bag.

Steven Doyle

Steven Doyle is a freelance writer specializing in high-quality information-driven content. Not only does he write about durable and buy-it-for-life (BIFL) products, he gets hands-on to find the very best.