Perfect Kanzen Principle Evolution continue the A-One's version of the dual-layer design. The outer material is soft while the interior is lined with a more stimulating material. The size of the sleeve has been upgraded from the original. It is still a hand size sleeve but less compact than the original.
This Gold version is a tight tunnel with rib texturing. As you go further into the sleeve, the tunnel narrows even more for a tightening feeling. The Perfect Kanzen Principle Evolution Gold is inspired by Hitomi Kitagawa.
>*Use only water-based lotion or lube with this product.