SEI MIO The Bed-Spreader – Adjustable Under-Mattress Restraint Set

Turn your bed into a pleasure playground — no DIY required.

The SEI MIO Bed-Spreader is a fully adjustable under-the-mattress restraint system that fits any bed size and tucks away discreetly when not in use. With soft, durable cuffs and sturdy straps, it’s perfect for exploring power play, submission, and sensory control — whether you're brand new to bondage or know your way around a safe word.

No bedposts needed. No limits, either.

• 🖤 Adjustable to fit single through king size beds
• 🔒 Four soft cuffs included – secure, comfy, reliable
• 🎯 Perfect for bondage beginners or seasoned players
• 🛏 Easy to set up, easy to hide
• 🇬🇧 Ships discreetly from the UK

🔗 Secure, Subtle, Ready for Play
Delivered in plain packaging from our UK base. No judgement, no fuss — just a cheeky night in, sorted.