The inside of the Hidachitukko Plus onahole sleeve is line with tons of irregular and varying ribs, nubs, and grooves to simulate flesh like textures. What set this sleeve apart from others is that throughout the tunnel, there are lots of what seemingly randomly placed bands of material inside going from one side of the wall to the another. If you look at the interior pictures, it really looks like your penis is traveling through some forest. The end result is a varying and different sensation from other sleeves on the market.
The vaginal tunnel itself is is a dual-layer construction. It swirls with a series of hugging curves designed to tug you to the max. And when you want the corkscrew tighter sensation, plug her anus with all you've got. Dual-layer construction design is where the outside of the masturbator is made from a softer material while the inside is lined with a harder more stimulating material. This made it possible to have a nice and soft tactile feel when holding the masturbator while the inside is more stimulating due to the second material.