The main complaint about microfiber applicators is the that they absorb too much product. Microfiber applicators make coating product application easier, quicker and more efficient, but coatings typically have a lower viscosity (not as thick - flow easier) so they soak through the microfiber to the sponge, wasting valuable product.
This applicator solves that issue with a simple impermeable barrier between the microfiber and the sponge, this prevents excess coating product from soaking through the microfiber into the sponge.
The barrier also limits excess product buildup which can become gummy and tacky as the coating begins to cure.