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Sei Mio The Bottom Line Under Mattress Restraint System
The Sei Mio The Bottom Line is an under mattress restraint system with plush wrist and ankle cuffs. Its adjustable webbing strap sits beneath your mattress, creating a discreet bondage setup without permanent bedroom fittings.
Six D-ring attachment points let you change where the cuffs connect, giving you different options for wrist and ankle positioning. The plush cuffs provide a soft feel against the skin, while nickel-free hardware connects the components.
These bed restraints fit beneath most mattresses, including king and super king sizes. The strap can stay tucked beneath the mattress between uses, keeping your setup out of sight.
How to Use and Care
- Read the supplied instructions and check the straps, cuffs and hardware for damage. Agree on boundaries and a safe word or stop signal with your partner.
- Slide the main strap beneath the mattress, leaving the six D-rings accessible on top of the bed. Adjust the webbing for a secure fit.
- Fit the wrist and ankle cuffs comfortably, then connect them to your chosen attachment points. Keep the fastenings accessible for release.
- Check comfort and circulation regularly. Release immediately if there is pain, numbness or tingling. Never leave a restrained person unattended.
- Follow the supplied cleaning instructions and allow all components to dry fully before storing.
Specifications
Fit and Setup
- Type: Under mattress restraint system
- Mattress compatibility: Most sizes, including king and super king
- Main strap: Adjustable webbing
- Attachment points: Six D-rings
- Installation: Beneath the mattress; no permanent fittings required
Materials and Contents
- Materials: Polyester, nylon, metal and PVC
- Cuffs: Plush wrist and ankle cuffs
- Hardware: Nickel-free
- Colour: Black
- Included: Adjustable restraint strap, wrist cuffs and ankle cuffs
FAQs About Sei Mio The Bottom Line
Do I need bedposts to use these restraints?
No. The main strap fits beneath your mattress, so you do not need bedposts or permanent attachment points.
Are wrist and ankle cuffs included?
Yes. Plush wrist and ankle cuffs are included and connect to the system’s six D-ring attachment points.
Material | Polyester |
Colour | Black |
Brand | Sei Mio |
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