The Taimanin Yukikaze 2 Thunder Hole is a single layer onahole with a 3D tunnel and textures. The entrance is a realistic looking vaginal opening with a small round hole for insertion. This small entrance allows for a tight fit around your penis and helps retain lotion within the tunnel. This means you don't have to stop as much to reapply lotion during use.
The inside of tunnel of Taimanin Yukikaze 2 Thunder Hole is separated into 7 nub covered tightness gates. Each gate is the focal point of stimulation while the channel groove in between helps retains lotion. At the end of the tunnel is a nub covered vacuum chamber. Simply squeeze out the air at the end as you enter to maximize suction sensation. The overall path is in wave form to vary the angle of pressure during your stroking.