Which is better for side sleepers?

The Classic 12" is the safer pick. Its medium-firm feel and thicker foam stack cushion the shoulders and hips better than a 10-inch gel foam mattress, which can feel thin under a heavier side sleeper.

The Classic 12" has the stronger longevity case: 12 inches of foam and a Forever Warranty. The 10-inch model carries only a minimum 1-year warranty, so its coverage ends far sooner.

Is the 10-inch worth the extra $126?

Only if you want gel foam for cooling or need a 10-inch profile. Otherwise the Classic 12" gives you more foam, a 365-night trial and a longer warranty for less money.

Does either sleep hot?

The Classic 12" uses a cover with cooling fibers but still has a memory foam layer that can trap heat. The 10-inch model uses gel memory foam, which is made to reduce heat buildup.

Can both go on an adjustable bed?

The Classic 12" is listed with an adjustable bed specialty style, so it is designed to flex. The 10-inch model's listing does not state adjustable bed compatibility, so check with the seller first.

How long until I can sleep on them?

The Classic 12" is ready about 24 hours after unboxing. The 10-inch model's expansion time is not stated, but most foam mattresses of this type need several hours to a day.

Nectar Classic 12” King Mattress vs Nectar Sleep Memory Foam Mattress

Both are Nectar memory foam mattresses in king size, but they are different builds. The Classic 12" is the thicker, newer design with a 365-night trial and a Forever Warranty, and it is the cheaper of the two at $552.00 at The Drift as of November 4, 2026. The 10" Gel Memory Foam model is $677.99 at Walmart as of the same date, so you pay about $126 more for a thinner mattress. Most shoppers should take the Classic 12".

Today the Nectar Classic 12” King Mattress costs $125.99 less at its best price.

Ask our shopping agent

It checks today's price at every store, compares the alternatives and answers in about a minute.