“Greylock” – Medium

Greylock 2020
Greylock Greylock 4-2021 Grelock close 2020 Silver label 5-2021


Caliber Bolsa Coil – Simple Comfort

A simple, medium-firm feel. Excellent support at this price level.

Twin (38"x75")$419$269
Twin XL (38"x80")$519$319
Full (53"x75")$569$379
Queen (60"x80")$599$399
King (76"x80")$858$539

*”Set” includes mattress and boxspring.
*Standard boxspring heights: 9″, 5″, 2.5″
*This mattress can be made double-sided by adding 35% to the mattress price.
*Do you need an odd/special size? Please CLICK HERE to send us an email.

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Greylock Mattress

A simple, medium-firm feel. Excellent support at this price level.

Firmness level:  Medium-Firm
Mattress thickness:  7.5″
Coil System: 
6” Caliber Edge, Bolsa
Coil Count (Q):  660

Celsius Ice® breathable, stretch fabric – unquilted
Comfort Layer:  .75″ Firm upholstery – 1.8 density 
Base Layer: 
.75” breathable, insulator pad
Fire Barrier: 
Inherent Woven Rayon (made from silica), *no chemical sprays*
Single sided, no-flip construction
7 Year, Non-Prorated


Support system

• 660 coils in queen size
• Caliber-Edge coils provide a firmer edge when sitting
• 26% more durable than foam encasement
• Works well with adjustable beds
• Made in USA by Leggett & Platt.

What you’ll notice:
Very supportive feel with just the right amount of conforming effect. Low motion transfer, which allows partners to remain undisturbed when changing sleeping positions. Coil system is very flexible and works perfectly on adjustable beds.


• Celsius Ice® breathable, stretch fabric w/ integrated FR properties
• All USA made materials

Comfort Layer

.75″ of firm, 1.8 lb. density upholstery padding

• Provides a flat, medium-firm sleeping surface
• Above industry standard for poly-foam density
• CertiPUR-US Certified
• Made in USA

What you’ll notice:
An overall medium feel with noticeable support. Unquilted top panel will allow the body to lay flat. This is the least expensive Bolsa coil mattress made by Yankee.

The Greylock mattress is on display at all Yankee Mattress showrooms. Come test one today!


*Is your mattress not a perfect rectangle? Do you have an angled corner or one side longer than the other? Click HERE to send us an email.

Additional information

Mattress & Set

Twin Mattress (38” x 80”), Twin Set (38” x 80”), Full Mattress (53” x 80”), Full Set (53” x 80”), Queen Mattress (60” x 80”), Queen Set (60” x 80”), King Mattress (76” x 80”), King Set (76” x 80”)


3" Boxspring, 5" Boxspring