Lucid 4" Gel Memory Foam Topper review

Lucid sells its Gel Memory Foam Topper in 2, 3 and 4 inch profiles, and on its own store you can choose a cooling gel, bamboo charcoal or lavender infusion. The foam is ventilated for airflow and CertiPUR-US certified, and Lucid offers split king, split queen and split California king sizes for adjustable bases. Walmart.com sells a 4-inch Cooling Gel with Aloe version that Walmart ships itself; the queen was $116.00 when we checked, with king at $149.99, and the listing gives a queen weight of 9.73 pounds and a 4.3 average from 1,902 ratings. The twin, twin XL and full 4-inch sizes were out of stock there. Lucid's store gives a 30-night trial and a 3-year limited warranty, while Walmart showed free 90-day returns. The foam is spot clean only and has no cover, so put a protector over it.

Who it is for

Budget buyers who want a brand with split sizes

Price

$116 for a 4-inch queen on Walmart.com when checked; king $149.99.

Current price is USD $116.00
Quoted from the vendor pricing page on November 11, 2026.

Key features

• 4-inch profile with cooling gel, bamboo charcoal or lavender infusion on Lucid's store
• Ventilated memory foam, CertiPUR-US certified
• Split king, split queen and split California king sizes on Lucid's store
• 30-night sleep trial on Lucid's store; free 90-day returns on Walmart.com
• 3-year limited warranty

Strengths and weaknesses

• Strength: Sold and shipped by Walmart.com
• Strength: Split sizes suit adjustable bases
• Strength: HSA/FSA eligible on Lucid's store
• Weakness: Spot clean only and no cover
• Weakness: 4-inch twin, twin XL and full were out of stock on Walmart
• Weakness: 30-night trial on Lucid's own store is short

Key facts

• 4-inch queen: $116 at Walmart
• Queen weight: 9.73 lb
• Care: Spot clean only
• Warranty: 3 years

Where it ranks

Lucid 4" Gel Memory Foam Topper is No. 7 in our Best 4-Inch Mattress Toppers verdict.