Mainstays 6 in Twin Innerspring Mattress vs Zinus 6 Inch Green Tea Cooling Gel Memory Foam

The Mainstays is the better pick for a child's room, bunk bed or trundle, where its 6-inch firm innerspring build and low profile fit tight spaces. The Zinus suits an adult side sleeper who wants a medium-feel memory foam bed with cooling gel and a 10-year warranty. Owners rate the Mainstays well overall, but the Zinus has the edge on pressure relief and heat management. Neither is a long-term premium mattress; both are budget boxed beds.

• Choose the Mainstays if you need a firm, low-profile twin for a bunk, trundle, dorm or guest room and want an innerspring feel.
• Choose the Zinus if you are an adult side sleeper who wants medium memory foam, cooling gel and a 10-year warranty.