The middle model of the three current iZone beds is the Z2. Like them, it has a two-layer support core with polyurethane, latex and water support modes, and a memory foam comfort layer. It differs from both of the other models in the thickness of the base layer, from Z1 in the thickness of the comfort layer, and from the Z3 in the composition and form of the comfort layer. It also differs from the Z1 in the nature of the calibrators.
The polyurethane foam base layer in the support core of the Z2 is 5" high. Like the base layers in the other two iZone beds, this base is billed as anti-bacterial. Very firm polyurethane foam is the most common support material in specialty sleep mattresses.
The engineered latex layer in the support core of the iZone Z2 is 3½" high, as it is in the other two models. It has fourteen oval channel cuts, seven on the right and seven on the left. They house the water-filled calibrators which let support be customized for each side of the bed. As in the other "Z" beds, air can flow through the channel cut to the water cylinders to moderate the temperature. The water is a heat reservoir, absorbing and releasing heat.
Unlike those in the Z1, but like those in the Z3, these calibrators are foam filled to dampen wave action. iZone claims that these water chambers help keep the overlying memory foam free from body impressions.
Like Z1, the comfort layer in the Z2 is a sheet of ventilated memory foam. However it is 1½" thick. The memory foam is for pressure relief and motion isolation, and the ventilation is for cooling and freshness. This is to combine with the water and the latex for contouring support.
The cover on the memory foam is antimicrobial It is zippered for removing and washing, a trait shared by the mattress cover. It also has a bed-bug barrier.
The iZone Z2 can be purchased online at the iZone site. It is also available in The Bedroom Store in the St. Louis area (six locations). It comes with a 90-night sleep trial and a 10-year warranty.
2440 Adie Road, St. Louis, MO 63043, Phone (314) 997-5222, Fax (314) 432-3542
Hybrid mattress - latex, water PU foan, memory foam
PU base, Latex with oval channels, oval water tubes (calibrators), memory foam
Knit, fabric not specified, zippered for removal and washing
Any firm base with solid support
Adjustable support for two sleepers, airflow for cooling,
Keep in sanitary condition, and provide proper foundation