Ark Street Thick Coconut Fiber Mat Liner for Terrarium Pets - Small Animals, Spiders, Lizards

The material itself is really nice. The only thing that I am not too happy about is that I cut it to fit pretty tight, after I warmed up the cage for 1/2 day, it shrank and left gaps in the areas that use to be tight. Now my crickets can get down in the cracks.