The Arrival

Sealy Posturepedic Optimum Chill Trio Dione can be purchased from Sleep Country Canada either online or in person at one of their stores. Sleep Country offers free shipping on orders above $75, so mattress deliveries are free by default. Chill Trio Dione ships wrapped in plastic.

The mattress arrives within 3–5 business days via Sleep Country’s own delivery teams. Customers may opt for either a simple delivery or pay to upgrade to Sleep Country’s Green Glove Delivery. This service includes delivery to the room of the customer’s choice, setup, removal of the customer’s previous mattress, and disposal of used packing material.

The Unboxing

The mattress is relatively easy to unpack. The plastic sheet isn’t difficult to remove, though two people are needed to haul the mattress to its desired room and position.

The Look

Sealy Posturepedic Optimum Chill Trio Dione has a soft, icy-looking colour scheme. It features an irregular white-and-grey pattern with light blue highlights. A blue band encircles the mattress halfway up, with Sealy’s brand and model logos at the corner.

The Feel

Sealy Posturepedic Optimum Chill Trio Dione has a medium-firm feel. It feels slightly cool when you first lie down, due to Sealy’s OptiSense™ Liquid Gel Memory Foam with ChillActive™ technology. Despite the relative firmness, this mattress has a fair bit of “hug” to it. You will notice your body sinking into the mattress’s surface.

The following results were determined by licensed 3rd-party engineers, commissioned by us:

Sealy Posturepedic Optimum Chill Trio Dione is available in one medium-firm option only. It is promoted as a cooling mattress, but given the limited construction, we don’t find it as cool as advertised.

Chill Trio Dione Mattress Layers

This Sealy Posturepedic Optimum Chill Trio Dione mattress contains only two foam layers: a comfort layer and a support layer. Most other memory foam mattresses also include at least one transition layer. This makes Chill Trio Dione highly unusual for a foam mattress, especially at its high price point.

• First layer: 3″  of memory foam. This layer provides comfort and conforms to your body the most as you sleep. Foam density: unspecified.

• Second layer: 8” of support foam. This dense layer is the mattress’s foundation and prevents you from sinking too far into the mattress while you’re sleeping. Foam density: unspecified.

Sealy hasn’t disclosed the exact composition of its foam layers. Sleep Country Canada’s website claims that the foam layers use OptiSense™ Liquid Gel Memory Foam with ChillActive™ technology to help conform to your body and cool you as you sleep. No information is available on where and in what proportion these product features are used.

All foam used in Chill Trio Dione is CertiPur-US® certified.

Chill Trio Dione Mattress Cover

The mattress cover features 2x Sealy Chill™ 2.0 cooling yarns. This yarn is meant to contribute to heat dissipation, but how it does so is unknown. The exact composition of the Ultra-stretch Chill-Trio™ is unspecified on either Sealy’s or Sleep Country Canada’s websites.

Sealy’s involvement in the mattress industry goes back to the 1880s, with the company taking its name from the Texas town where it first began producing made-to-order mattresses. The business grew rapidly and became an industry leader by the 1920s, contributing to many innovations and patents. The Posturepedic line was launched in the early 1950s to “provide technology that delivers deep, targeted support right where you need it.” The large company also owns Stearns & Foster, another well-known mattress brand.

The Sealy Posturepedic line has seen significant competition in recent years from online mattress brands. Innovative companies like Octave ship directly to buyers and bypass the brick-and-mortar retail model. Mattresses like Sealy, which often have a higher price tag, have to work harder to compete with the value and convenience of online mattress companies.

Sleep Country Canada will ship your mattress in 3 to 5 business days, but the company does not deliver on weekends. Orders over $75 (before taxes) ship for free. There are some exceptions if you live in the Northwest Territories, Yukon, Nunavut, Newfoundland, or Labrador. If you live in any of those regions, you’ll pay a $120 shipping surcharge. 

Sleep Country’s 100-night sleep trial is average compared to other brands. If you decide to return your mattress, you must do so yourself. Sleep Country does not offer pickup service. The company will also not refund your mattress; they only offer in-store credit, and you must pay a $65 fee to exchange your mattress.

We hire 3rd-party engineers and use public data to rate mattresses on over 25 criteria.

Sealy is a well-established name in the mattress industry, and the Posturepedic® line has been around for a long time. Unfortunately, the Chill Trio Dione fails to live up to that reputation. With an overall rating of just 3.7 / 10,  it falls far behind competitors like Octave (rated 9.7 / 10).

This low rating is due to the mattress’s high price, low number of layers, limited features, and restrictive policies around returns and exchanges. For $3,299 for a queen, the Chill Trio Dione doesn’t offer enough value for the cost.

Instead, try a memory foam mattress with more cooling features from competitors like Octave. Octave costs significantly less ($899 for a queen) and offers far more value for the price. It comes with cool-to-the-touch CryoFusion™ cooling nanofibre cover, heat-dissipating CopperGel™ memory foam, and temperature-balancing PolarMAX® phase-change material. Because of its excellent value and advanced cooling, Octave is Mattress Reviews’ Top Pick for Best Cooling Mattress. It also holds our second-highest overall rating for any mattress we’ve reviewed.