The bristle is made of sisal (a Mexican plant agave with large fleshy leaves) and the head is made of sustainable wood.
This stiff fiber brush is durable and ideal for all dish-washing purposes.
How to replace the head: For the first time, it is a little stiff to bend the wires and you may need to use a pair of pliers to loosen it. After that, you can use strong fingers to squeeze the wires together, loosen the metal grip, and pop off the brush head. Put the new brush head-on and use it again.
Once worn out, the wooden head and sisal bristle can be 100% composted or buried in the backyard.