Mainstays 6 in Twin Innerspring Mattress vs Zinus Slumber 1 6" Innerspring Mattress

Both are 6-inch twin innerspring mattresses with firm support, aimed at bunks, trundles, dorms and guest rooms. The Zinus Slumber 1 edges ahead: it uses Bonell springs plus Visco latex foam, carries a 10-year warranty, and rates slightly higher with owners. The Mainstays adds a gel foam layer and OEKO-TEX and CertiPUR-US certified materials, but it is the plainer build with no stated warranty. Pick the Zinus for a longer-lived adult or stomach-sleeper mattress; pick the Mainstays if you want gel foam cushioning and certified cover materials for a kid's or guest bed.

• Choose the Mainstays if you want a gel foam top layer and certified cover and foam for a bunk, trundle or guest bed.
• Choose the Slumber 1 by Zinus if you want a firmer, more reactive innerspring feel backed by a 10-year warranty.