Sturdy rubber tubing inside for dogs who like a nice grip on fabric frisbees
I ordered the medium/large size for my Golden.
It's well made and hefty. My rainbow bridge dog would have been ALL OVER this frisbee. The weight would not have bothered him and he would have been biting tubing on the retrieve instead of stopping to trash it along the way.
This is the heaviest in ounces fabric frisbee I have ever used. My Golden is adjusting to the weight, but can pick it up okay.
I know dogs this would be perfect for. I had one.