This is suppose to be the Alvin Prestige brush holder and easel. If you look closely, you'll see that the brand on it is actually "Heritage". Weird. Anyway, it looks the same as the Amazon product photo so it's not a big deal.
The brush holder is made of black nylon with a Velcro closure. I can feel some hard cardboard-like thing which I think is to make it stand.
There are six slots on each side. The slots are big enough for some of my thicker brushes. They are elastic, so they can hold thinner brushes tight without them moving. There's also some sort of cushion backing.
In total, there are 13 slots, including one right in the middle. Some slots are larger, so you can fit maybe two brushes in those slots.
This is how it looks when it stands up, functioning as a brush easel. It's quite convenient to have this on the ground, especially if you're sitting and sketching, and have to reach for brushes.
This is the small plastic stopper that you tighten to make the brush holder stand.
With the stopper, you can adjust the string on the spine, thereby allowing the brush holder to stand.
The maximum length of brush I suggest would be 32cm, and longer and you will see the brush hair coming out of the holder.
On Amazon, there's another alternative called Prat Start Brush Holder and Easel which I've also reviewed. These two are essentially the same thing. Some differences though. Prat is more expensive, and they have less cushion backing (which may be an advantage if you like the whole thing thinner).
This is a good and smartly designed brush holder. Highly recommended.