10 Year Warranty

The Crystal is one of the top models in the Four Seasons line. If you're not familiar, the Four Seasons line of mattresses by Spring Air is two-sided and each side is crafted to optimize different times of the year. There is a cooler (silk) side for spring/summer sleep and there is a warmer (wool) side for winter and fall rest. Not only do these different materials utilize temperature regulation, they provide a bit more comfort to you, when you first lie down.

Luxury Firms have become probably the most popular feel of mattress in the sleep product industry. This is because they offer the supportive feel of a firm but they also have the initial comfort foams that add some cushion to your pressure points. Each side of this mattress has three whole inches of foam between you and the coil and the density and quality of those foams can be felt immediately. 

For a stable, motionless, body contouring, cool sleep, there really isn't much that the Crystal is missing. It's manufactured in the USA (Grand Rapids, MI) and is CertiPUR-US certified as non-toxic. 

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Crystal - Four Seasons Flip Mattress

SALE reg.
Twin $834 $1,200
Twin XL $1,040 $1,500
Full $1,062 $1,525
Queen $1,142 $1,625
King $1,420 $2,025
Cal King $1,570 $2,175
Other sizes

free shipping

Mattress Scale
semi firm mattress
Approx. Height of Set: 21" (Matt 12.0" Base 9")

This Mattress Features:

CertiPUR-US certified foams are:


✓ Made without ozone depleters
✓ Made without PBDEs, TDCPP or TCEP (”Tris”) flame retardants
✓ Made without mercury, lead, and other heavy metals
✓ Made without formaldehyde
✓ Low VOC (Volatile Organic Compound) emissions for indoor air quality (less than 0.5 parts per million)
✓ Made without phthalates regulated by the Consumer Product Safety Commission


Temperature Regulating 4-Way Stretch Knit
(Wool Quilted for Winter, Silk Quilted for Summer)
2" High Resiliency Contour Foam 

Mattress(Top Side)
1" Pressure Regulating High Density Foam
1/2" Latex 

800 Individually Wrapped Coils - Foam Encased 

Mattress(Bottom Side)
1/2" Latex
1" Pressure Regulating High Density Foam

2" High Resiliency Contour Foam
(Wool Quilted for Winter, Silk Quilted for Summer)
Temperature Regulating 4-Way Stretch Knit


10 Total Years (10 full)

Crystal - Four Seasons Flip Mattress

The Crystal is a part of the Four Seasons line (by Spring Air) that utilizes two different covers; one is wool for the colder months and one is silk for the warmer ones. In addition to 'flip mattresses' being longer-lasting, this temperature regulation feature is really something unique; it's probably one of the reasons why this line of mattresses is one of the nation's best sellers. 

This mattress is a luxury firm; it has HR (High Resiliency), High Density foam and latex, atop a body contouring pocketed coil spring system. There is the customary foam encasement that reduces motion transfer. With a coil count of 800, it's high enough to provide optimal support but just low enough to be indicative of the coils being made from thicker than average metal. 

For a firm (though, not rock-hard) feel and a cool sleep, I'd recommend this model. It's completely American made, from American materials and is certified as non-toxic. (CertiPUR). 


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  • Shipping or delivery of this item to most areas within the 48 contiguous states only. We cannot offer delivery of this item to Alaska, Hawaii, US Territories or APO/FPO addresses without added charges. Please call customer service for rates and availability.
  • Nationwide and "free" rates are valid to most cities in the continental US. Destination must be accessible by large truck. Some locations may have a small surcharge.
  • For complete details, read our Shipping and Return policies.
  • Please call customer service for returns.

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