DUMOS Memory Foam Mattress Topper King Size 3" — Gel-Infused Cooling, Removable Washable Cover

The DUMOS 3-inch memory foam mattress topper for king beds adds a cooling gel layer and plush pressure relief to refresh an existing mattress without replacing it.

Upgrade your sleep surface with a breathable, gel-infused memory foam pad designed to sit atop beds, sofas, or RV bunks. This king-size 3" topper combines contouring support with a removable, washable cover and anti-slip fastenings so it stays secure overnight. The foam meets CertiPUR‑US standards for content and emissions, and the design balances softness with structural durability to extend mattress life and improve nightly comfort.

How does the topper keep me cooler during the night?

The foam contains a cooling gel infusion that helps dissipate body heat compared with traditional solid memory foam. The cover is made from breathable polyester that encourages airflow, preventing heat buildup at the surface.

• Gel-infused foam draws heat away from contact points
• Permeable cover fabric increases ventilation
• Three-inch thickness balances insulation and airflow

Will this fit my king bed, sofa, or RV mattress?

This topper is sized for a standard king mattress but is flexible enough for other flat sleeping platforms like sleeper sofas and RV bunks. Elastic straps and anti-slip backing hold the topper in place, reducing shifting and bunching even on thinner surfaces.

• Standard king dimensions for full bed coverage
• Strong elastic straps for secure attachment
• Anti-skid backing for use on sofas and campers

How supportive is the 3-inch memory foam for pressure relief?

At three inches thick, the DUMOS topper contours to body curves to relieve pressure at shoulders, hips, and lower back while still offering underlying support. It softens a firm mattress or refreshes a worn surface without creating a sink-in feeling that can interfere with alignment.

• Adaptive memory foam contours to pressure points
• Maintains structural support for spinal alignment
• Suitable for side and back sleepers seeking extra cushioning

How do I care for and clean the topper?

The cover unzips with a durable metal zipper for easy removal and machine washing, making routine cleaning simple. The foam core should be spot-cleaned and air-dried to preserve integrity; rotate the topper occasionally to even out wear.

• Removable, machine-washable polyester cover
• High-quality metal zipper for secure and easy removal
• Spot-clean foam and allow full air drying before re-covering

Who is this for? The DUMOS 3-inch cooling memory foam topper is ideal for sleepers who want an affordable comfort boost without replacing their mattress. It suits people who overheat at night, those needing extra pressure relief for hips or shoulders, RV and camper travelers seeking better sleep on the road, and anyone wanting a washable, stay-put solution for a sofa bed. If you want a CertiPUR‑US certified foam layer that improves comfort, stabilizes sleep posture, and stays fresh with a removable cover, this topper is built for you.