Very durable. Food-grade. Lasts longer than wood. You can write hive notes on it. Waterproof. A great choice for beekeepers  that are harvesting propolis from traps. 

Tired of cutting out burr comb every time you open your hive? Try one of our flexible inner covers; they sit flat against the top bars of the frames, so there is no space for the bees to build on top of the frames. It also allows you to take a quick peek at one corner or edge of the box, so no need to fire up your smoker if you're just taking a quick peek to see if your bees need another honey super.