Which is better for a child's first twin bed?

The Avenco. Its spring core gives a firmer, bouncier surface that is easier for kids to move on, and it is CertiPUR-US certified. The Kow is softer and conforms more, which some small sleepers find harder to roll over in.

Which is better for side sleepers?

The Kow. Gel memory foam cushions the shoulders and hips, which matters on a thin 6-inch mattress. The Avenco's spring feel is firmer at pressure points.

Is the Kow worth saving $4 over the Avenco?

Only if you prefer memory foam. The $4.01 gap is small, so pick on feel: foam for pressure relief and less motion transfer, springs for bounce and firmer edges.

Neither is built for long life at this price and 6-inch thickness. Innersprings can sag or squeak over time, and budget memory foam tends to soften and lose support. Expect either to serve best as a kid, guest or dorm bed.

Can I use either on an adjustable bed?

The Kow is listed for adjustable beds, so it bends with the frame. The Avenco is not listed as adjustable-bed compatible, and its spring unit makes it a poor fit for a bending base.

Do both come rolled in a box?

Yes. The Avenco is sold as a mattress in a box, and the Kow is a memory foam mattress in a box. Both need time to expand after unrolling.

Avenco 6 Inch Twin Mattress vs Kow 6 Inch Twin Size Gel Memory Foam Mattress in a Box

Both are budget 6-inch twin mattresses within about $4 of each other: $94.00 at Target for the Avenco and $89.99 at Walmart for the Kow, as of November 4, 2026. The Avenco's foam-and-spring build suits sleepers who want a bouncier, more supportive feel, especially kids and lighter adults. The Kow's gel memory foam suits sleepers who want pressure relief and less motion transfer, and it is the cheaper of the two.

Today the Kow 6 Inch Twin Size Gel Memory Foam Mattress in a Box costs $4.01 less at its best price.

Ask our shopping agent