MLILY Harmony Chill 3.0 Mattress Review

The MLILY Harmony Chill 3.0 Mattress excels at isolating motion. Its foam comfort layers and polyfoam support core absorb movement, helping the mattress remain still and silent when sleepers get in and out of bed or change positions. Those who sleep with a partner should not be disturbed by their partner’s movements during the night.

In general, memory foam absorbs motion well. The Harmony Chill 3.0’s all-foam construction and medium (5) firmness help it stand out.

Pressure relief is a strong point of the MLILY Harmony Chill 3.0 Mattress. The polyfoam and memory foam comfort layers provide body contouring to help relieve pressure on a sleeper’s joints. At the same time, the polyfoam support core is designed to ensure that the sleeper’s body remains aligned and even.

Side and back sleepers under 130 pounds experience optimal pressure relief on the MLILY Harmony Chill 3.0 Mattress. Sleepers over 130 pounds sink deeper into the mattress, which may lead to pressure buildup in some cases.

The MLILY Harmony Chill 3.0 sleeps relatively cool for a foam mattress. The cover is made with a breathable knit fabric, and the first layer of polyfoam is coated with phase change material (PCM) designed to dissipate body heat. The bamboo charcoal and gel infusions are also designed to reduce heat retention, and the convoluted polyfoam layer helps promote airflow.

Temperature control is a common issue with all-foam mattresses, which leave little room for heat to escape. Compared to others in its category, the Harmony Chill 3.0 Mattress performs slightly better due to its multiple temperature-regulating features.

Sleepers may find that the perimeter of the MLILY Harmony Chill 3.0 Mattress sags under pressure. This lack of edge support may push sleepers to the center of the mattress in order to avoid feelings of roll-off. Weak edge support can also make it more difficult to get out of and into the bed.

It’s normal for all-foam beds to lack edge support, especially for those with a soft or medium feel. The MLILY Harmony Chill 3.0 Mattress performs on par with other similarly constructed mattresses. Shoppers looking for sturdy edge support may want to consider a firmer mattress or one with an innerspring support core.

Sleepers shouldn’t have too much trouble changing positions or moving across the surface of the MLILY Harmony Chill 3.0 Mattress.

Foam mattresses generally allow sleepers to sink in, making movement across the bed more challenging. This is most evident in mattresses with thick layers of memory foam. Because the Harmony Chill 3.0 contains more polyfoam, it’s more responsive than many all-foam models. Its medium firmness also provides better ease of movement than a softer mattress would.

Body weight can also be a factor with movement. Sleepers over 230 pounds tend to sink more into the mattress, making it more difficult to move around. These sleepers may find better ease of movement in a firmer mattress, or a model made with innersprings or latex.

The MLILY Harmony Chill 3.0 Mattress has both benefits and drawbacks for sex. The mattress provides traction and adequate ease of movement, though it lacks bounce.

The mattress also has weak edge support, which may limit positioning and constrain couples to the middle of the bed. On the other hand, it’s virtually silent when bearing weight.

Many bed-in-a-box style mattresses off-gas when they are removed from the box. These chemical odors are particularly common in mattresses with memory foam and polyfoam layers. The MLILY Harmony Chill 3.0 Mattress produces moderate off-gassing.

MLILY recommends unboxing the mattress in a well-ventilated area and allowing it to air out for about 24 hours before use. Off-gassing smells may linger for a few more days, but these are not generally considered harmful.