Underlay for mattresses that improves airflow and reduces trapped moisture for RV and home beds, the MYOYAY Mattress Underlay aims to cut damp and musty smells. Improved ventilation can make nights feel fresher and more comfortable. Is this a practical, low-fuss solution for camper and boat owners?
⚡ At a Glance
- • Breathability: Designed to encourage under-mattress airflow rather than trap humidity
- • Best for: RV, camper and boat owners, plus anyone wanting improved mattress ventilation
- • Not ideal for: Users seeking extra cushioning or thick mattress toppers
A large underlay that sits beneath the mattress to help air circulate beneath the sleeping surface. Useful where ventilation matters, such as in mobile or seasonal sleeping spaces.
Stops moisture build-up – with double-layer breathable holes
A honeycomb pattern across the top sheet forms large breathable channels while a 3D mesh underside maintains flow beneath the mattress, allowing trapped air to escape. The two-layer arrangement promotes continuous circulation along the mattress base.
Damp air is routed away from the mattress surface, reducing odours and the risk of mould. Particularly helpful in boats, campers and humid rooms where condensation can develop.
High load resilience – thanks to polypropylene three-layer fibre construction
Three layers of polypropylene fibre create a supportive structure with strong resilience, specified to handle more than 3,000 pounds without easy deformation. The fibre arrangement preserves shape under repeated compression.
Maintains structural integrity beneath heavy mattresses and regular use, helping the underlay last longer. Performance reduces the risk of sagging across high-use sleeping areas.
Custom fit and portability – with large cuttable format and foldable design
Supplied as a single sheet measuring 118.1 x 39.4 x 0.3 inches that can be trimmed with scissors to match Queen, King or Twin dimensions. Lightweight construction folds compactly for transport and storage.
Simple to trim and place under a mattress for a tailored fit in RVs, boats and camper layouts. Easy to remove and stow when space is limited or for seasonal use.
✨ The 4 Key Reasons for MYOYAY Mattress Underlay
- Supportive Polypropylene – Maintains shape under heavy mattresses and repeated everyday use
- Large Cuttable Sheet – Trim to fit Queen, King or Twin mattress sizes
- Reusable Construction – Polypropylene layers hold up to multiple uses across seasons
- Easy Installation – Foldable design lies flat beneath mattress for quick setup
📋 Technical Details at a Glance
- Category: Mattress underlay
- Material: Polypropylene three-layer fibre
- Size: 118.1 x 39.4 x 0.3 inches
- Thickness: 0.3 inches
- Layers: Three-layer fibre fabric
❓ Frequently Asked Questions
Q: Can the underlay be cut to fit standard mattress sizes?
A: Yes. A single large sheet measuring 118.1 x 39.4 inches can be trimmed to fit Queen, King and Twin mattresses.
Q: Is the underlay suitable for use in RVs and boats?
A: Yes. The design is intended for bedrooms, RVs, boats and campers and can be used in a range of weather to help keep mattresses dry.
Q: How durable is the construction and how much weight can it take?
A: Polypropylene three-layer fibre construction offers strong resilience and can support more than 3,000 pounds, resisting deformation and allowing repeated use.
🏆 Our Verdict
Ideal for RV and boat owners, campers and anyone wanting to keep mattresses drier and fresher. Double-layer ventilation paired with a cuttable, resilient polypropylene sheet tackles moisture while remaining simple to fit. Durable construction and reusability suggest good long-term value for those needing low-maintenance under-mattress ventilation.
