A hidden air channel inside the ROS MAX head. It links the mouth to small openings behind the doll's ears, so air can move freely during oral contact. Only available on ROS MAX heads from Irontech Doll and Real Lady.
Pressure Relief ChannelThe Pressure Relief Channel can't be ordered separately. It's only available with a ROS MAX head, at no extra charge.
How it works
On an ordinary ROS head, the mouth is a sealed chamber. On the way in, the air inside is compressed and pushes back. On the way out, it creates a vacuum. This is the discomfort the manufacturer set out to remove.
The channel gives that air somewhere to go. It escapes through the openings behind the ears, so there's no resistance on the way in and no suction on the way out.
The openings were placed behind the ears on purpose, so the face stays untouched. In a normal pose, and under a wig, they aren't noticeable.
Where it comes from
Irontech Doll and Real Lady introduced ROS MAX on June 27, 2025, as a joint development with Iron Art. The Pressure Relief Channel is one of the main differences between ROS MAX and the previous ROS generation.
What's important to understand
- Only ROS MAX heads have the channel. Previous-generation ROS heads, soft heads and hard heads don't.
- An existing ROS head can't be converted to ROS MAX. You need a new ROS MAX head.
- With both Irontech Doll and Real Lady, the channel is offered on every ROS MAX head at no extra charge.
- The channel works passively. There's nothing to switch on, no power and no controller.
Which heads are ROS MAX
The list keeps growing. At launch it included the Irontech Doll heads Celine, Miku, Suki, Ivy, Rita, Vivian, Kitty and Penny, and the Real Lady heads Hailey and Lena. For the current list, check our catalogue: these heads are marked ROS MAX.
What else comes with a ROS MAX head
The channel works alongside the other ROS MAX features and doesn't affect them.
- Movable jaw. The mouth opens with light pressure on the chin, and stays at whatever angle you set.
- Realistic mouth with teeth and tongue. The teeth are hidden when the mouth is closed, and the tongue lifts slightly when it opens.
- Movable lower eyelids. Light pressure with a fingertip gives a half-closed look.
- Reinforced eye sockets. The face doesn't deform when the mouth opens.
- Lower weight. A ROS MAX head weighs about 2.5 kg, roughly 0.5 kg less than a ROS head.
Works in combination
As with ROS, a ROS MAX head can take ROS Robotisation and Oral Heating. These are separate options, ordered on top of the head.
How to use it
- Before use, make sure the openings behind the ears aren't tightly covered. A wig and wig cap are fine, but don't press accessories against them or tape over them.
- Apply water-based lubricant to the mouth, as with any ROS head.
- After use, rinse the mouth with warm water and mild soap, through the lips. Some water and lubricant may come out through the openings behind the ears. This is normal.
- Dry the mouth and the channel as described below.
How to dry the channel
The channel is narrow and holds very little water, so drying takes only a few minutes. Use either method.
Method 1: drain and blow dry
- Tilt the head face down and slightly to one side, so water drains out through the mouth and the openings behind the ears.
- Open the mouth and direct air into it from a hair dryer on the cool setting, or from an ordinary fan. The air runs through the channel and out behind the ears, pushing out the remaining moisture.
- Blow for about five minutes.
Never use the hot setting. Heat damages the make-up and the glued seams near the ears.
Method 2: absorbent stick
- Insert a drying stick (diatomite or viscose) into the mouth. It's the same kind used for the vaginal canal. If you don't have one, a strip of microfibre twisted into a cord works too.
- Leave it in for 15 minutes with the mouth open. The stick absorbs the moisture in the mouth. The channel dries by itself in the meantime, because with the mouth open it's open at both ends.
- Remove the stick and dry it separately.
After either method, leave the head on a stand with the mouth open for a couple of hours somewhere well ventilated. This removes the last of the dampness, which otherwise causes odour in storage.
Care
- Don't put brushes, cotton swabs or any other objects into the openings behind the ears. The channel is narrow, swabs get stuck and leave fibres behind, and the silicone around it tears easily.
- Don't flush the channel through the openings behind the ears, and never under strong water pressure. Rinse through the mouth only.
- Don't blow the channel out with a can of compressed air held against the opening. The jet is too harsh for thin silicone.
- Don't put talc or cornstarch inside the mouth. In a narrow channel it clumps with leftover lubricant.
- Press the lower eyelids with your fingertips only. Nails and hard objects damage the silicone.
- Open the jaw with light pressure on the chin. Never force the mouth open.