“Greylock” – Medium

Greylock 2020
Greylock 2020 Greylock spec 2020 Grelock close 2020 Silver label 2020


Quantum Bolsa Coil – Simple Comfort

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

Twin (38"x75")$339$239
Twin XL (38"x80")$439$289
Full (53"x75")$469$319
Queen (60"x80")$499$339
King (76"x80")$899$519
Cal.King (72"x84")$999$594

*”Set” includes mattress and boxspring.
*Standard boxspring heights: 9″, 5″, 2.5″
*This mattress can be made double-sided by adding 25% 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:  9.5″
Coil System: 
8” Quantum Edge Elite, Bolsa
Coil Count (Q):  1,057

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 wood pulp), *no chemical sprays*
Single sided, no-flip construction
7 Year, Non-Prorated

Current build-time before shipment

common sizes:  2-3 weeks
odd/special sizes:  3 weeks


Support system

• 1,057 coils in queen size
• Quantum-Edge coils provides supportive 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 foam

• 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

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