This comes in a 4-pack folded neatly of perfectly rectangular cut-to-size sheets of approximately 1/3" thick natural jute fabric. It is strong, not easy to tear but can be cut with strong scissors if you need it for a different size enclosure than what these were pre-cut for by Rent-A-Coop.
Although I don't have a brooder going now to test this with chicks, I have raised duck and chicken chicks before and I can say... this should NOT be your only floor lining, it will get ruined very quickly. The chicks will scratch at it (they scratch at everything) and at best it will tear apart the fibers (not so bad) but likely to get caught on their toe claws or even beaks if they try to peck at the different colored bits. However, it would be a great lining for UNDER some wood shavings, pellets, or whatever else you would use for frequent replacement when it gets wet or poopy. That way when the chicks scratch it up there will still be a natural surface beneath and not plastic or the wood floor of your brooder that isn't as easy to clean. You could lift out the entire pad and all the stuff on top, shake it off, and if it's clean enough reuse it, or replace with another one.
My intended purpose this time around is to cut to size for
1) my bearded dragon enclosure
2) my conure cage
With the lizard, it's a replacement for loose wood shavings that, when he's on the hunt for bugs I put in there, sometimes get swallowed up with or instead of the bug. This will prevent the bugs from burrowing and won't cause any bedding swallows.
The with conures... they were immediately interested in the material as soon as I took it out of the package and it kept them occupied longer than many other things. I expect it'll be more similar to the brooder, they'll tear it up and eventually cover it with poop.... but in this house we don't do the "change their bedding every day" and it'll go a lot longer than newspapers.
At over $10 per piece, it's not exactly cheap, but if you can use it well to extend the lifespan with your critters it may be worth it. And if you have a vegetable garden, you could use the discards as compost or even lay it over the soil, cut a hole, and plant young plants directly under it for nutrition and protection.