Subrtex Gel-Infused Memory Foam Mattress Topper with Removable Fitted Cover review

Subrtex sells this gel-infused memory foam topper in 2, 3 and 4 inch versions and describes the 3-inch as the choice for extra comfort and support. The foam is slow-response memory foam with gel, it is CertiPUR-US certified, and Subrtex says it was fatigue tested to 360,000 cycles. Unlike bare foam toppers, it ships with a removable fitted cover. The strongest part of the offer is the paperwork: a 180-day guarantee, a 10-year warranty and free express shipping for US customers. When we checked, the 3-inch twin was $129.99 and the 3-inch queen $189.99. Subrtex does not publish a foam density, so there is less to judge durability by than with ViscoSoft, and sizes stop at the six standard ones. For a buyer who is unsure how a 3-inch layer will feel, the six-month window is the main reason to choose it.

Who it is for

Buyers who want the longest trial

Price

$129.99 for a 3-inch twin when checked; a 3-inch queen was $189.99.

Sale price $129.99
Quoted from the vendor pricing page on November 11, 2026.

Key features

• Gel-infused, slow-response memory foam, CertiPUR-US certified
• Removable fitted cover
• 3-inch version in twin through California king
• Fatigue tested to 360,000 cycles, according to Subrtex
• 180-day guarantee, 10-year warranty and free express shipping in the US

Strengths and weaknesses

• Strength: 180-day guarantee is the longest return window on this list
• Strength: 10-year warranty matches Tempur-Pedic at about half the queen price
• Strength: Fitted cover comes off for cleaning
• Weakness: Subrtex does not publish a foam density
• Weakness: 3-inch queen at $189.99 costs $10 more than ViscoSoft's sale price
• Weakness: No split or short sizes

Key facts

• 3-inch queen: $189.99
• 3-inch twin: $129.99
• Guarantee: 180 days
• Warranty: 10 years

Where it ranks

Subrtex Gel-Infused Memory Foam Mattress Topper with Removable Fitted Cover is No. 2 in our Best 3-Inch Mattress Toppers verdict and No. 3 in Best 4-Inch Mattress Toppers and No. 2 in Best Full Size Mattress Toppers and No. 2 in Best King Mattress Toppers and No. 2 in Best Memory Foam Mattress Toppers and No. 4 in Best Tempur-Pedic Mattress Toppers and No. 4 in Best Twin XL Mattress Toppers.