Serta iSeries Hybrid 300 13.625" Plush Mattress


Product Code: mfiV000095395
$1,199.00 - $2,199.00
This mattress feels:
Extra Firm Firm Medium Plush Ultra Plush
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  • Provides pressure relief and support
  • Helps reduce heat build-up at sleep surface
  • Adapts to your body for curve-hugging comfort
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  • Queen

    When it comes to mattresses, one size definitely doesn’t fit all. The mattress should be longer than the tallest person sleeping on it. The bed width should allow enough space to fold your arms behind your head without going beyond the mattress edge or touching your partner’s elbows (for two adults, we recommend either a queen or a king).

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 or as low as  $23.60/mo All monthly payments are rounded up to the nearest whole dollar. +Monthly payment is based on minimum purchase price alone of $625.00, excluding tax and delivery charges, for 72 months at 0% APR*. Learn more.
Delivery Information

Available to deliver as soon as tomorrow, Mar 19

  •    Split sizes also available. Contact us!
  •   1-877-384-2903


  • Chat With Us


Additional Information

Overview & Specs

Serta iSeries Hybrid 300 13.625" Plush Mattress

The Serta iSeries Hybrid 300 13.625” plush mattress is the ideal combination of spring and foam, soft and cool. This Serta 300 mattress provides luxury comfort at a mid-tier price, with premium pressure relief, support, and cooling technology working together to create the ideal plush sleeping experience.

The Serta iSeries 300 mattress is designed for those who like to sleep on their back or on their side, and if you like to shift between the two positions as you sleep, the built-in motion isolation means you won’t disturb your partner as you do so. The advanced 886 Pro-Support™ Coil System, encased in foam designed to provide edge support, is a solid foundation for the three foam comfort layers that conform to your body as you sleep, providing a comforting hugging feeling while relieving pressure points at the back, shoulders, and hips.

Unlike other plush mattresses with a hugging feel, the Serta 300 plush mattress keeps you cool, too, with .5” of Cool Reaction® gel memory foam and 2” of EverCool® Fuze gel memory foam reducing heat buildup at the sleeping surface. No more sweaty sleep!

Try the Serta iSeries Hybrid 300 12.625” plush mattress in your local Mattress Firm store or purchase online to test it out in your home with our 120-night sleep trial today.

      • Comfort Type: Plush
        Mattress Height: 13.625"
        Mattress Layer Breakdown:
        Quilting Layers:
      • HyperFeel Surface Design
        Comfort Layers:
      • .5” Cool Reaction Gel Memory Foam
      • 2” EverCool Fuze Gel Memory Foam
      • 1” Serta Balanced Support Foam
        Support System:
      • 886 Pro-Support with Best Edge Foam Encasement
      • Dimensions:
      • Twin: 39" W x 75" D
      • Twin XL: 39" W x 80" D
      • Full: 54" W x 75" D
      • Queen: 60" W x 80" D
      • King: 76" W x 80" D
      • Cal King: 72" W x 84" D
Suitable for Adjustable Base

Suitable for Adjustable Base

Low Motion Transfer

Low Motion Transfer

Cooling Technology

Cooling Technology





Red Carpet Delivery

We offer a guaranteed 1 day delivery window, or it’s FREE!*

Red Carpet Delivery Service

At Mattress Firm, we roll out the red carpet for you with this premium service - tailored to YOUR schedule. If your purchase is not delivered within the guaranteed 1 day window, your delivery is FREE.*

  • 1 day delivery window or delivery is free
  • Same day and next day delivery available In-store, Call, or Chat only
  • Free in home set up of your mattress set
  • Courteous and professionally trained Dream Team Delivery™ personnel
  • Red carpet and sanitary blue booties to protect your home

Red Carpet Delivery Details

We guarantee your new mattress will be delivered within a designated 1 day delivery window, or your delivery is free. If your delivery is late, simply contact the store of your original purchase after signing the delivery manifest with the delivery time stamp and we will credit your account or mail a refund check for the price of your delivery fee within three weeks.

Participation may vary. See store for details. Not applicable on all products. As part of our Red Carpet Delivery Service, we will contact you to schedule delivery whenever it's convenient for you. While we install your new mattress, we will also haul your old mattress away.

We do not ship internationally, to PO Boxes, or to Puerto Rico. For shipping to Alaska and Hawaii please Chat or Call 1-877-384-2903

*Not available in all areas

10 Year Limited Warranty


Serta® mattresses or foundations used with proper support are protected by a 10 year limited manufacturer’s warranty. Serta products are warrantied against manufacturing defects in workmanship and material (excluding covers and handles, except for handles on iSeries and equivalent level mattresses).


• Comfort Preference

• Bedding sold “as is”, or floor samples, or bedding purchased from second hand parties, non-retail establishments or received as a promotional item.

• Bedding height

• Corner guards

• Bent perimeter border rods due to moving or bending the sleep set for innerspring models

• Replacement of another piece in a sleep set unless it is also defective

• Damage of the mattress or foundation due to misuse or abuse

• Mattress damage due to an inappropriate foundation or when an incorrect bed frame is used

• Sheet fit

• Fabric Stains, soiling, fluid penetration, tears or burns

• Adjustable foundations (see owner’s manual for details on warranty coverage)

• Mattress fabric (except as noted in the Warranty Coverage Detail section for an All Foam mattress)

• Zippered mattress cover damage due to improper care including removal of cover

• Normal change in softness and recovery time associated with memory foam and latex materials over time. This does not affect the pressure relieving qualities of these materials.

• Body impressions in the mattress that measure less than 1½" for an innerspring mattress; less than ¾" for all smooth top (non-quilted) hybrid mattresses and All Foam model mattresses.

• Sagging in the mattress that measure less than 1½" for an innerspring mattress; less than ¾" for all smooth top (non-quilted) hybrid mattresses and All Foam model mattresses.


The warranty coverage runs from the original date of purchase. Replacement of the mattress or foundation does not extend its limited warranty or begin a new limited warranty period. Your warranty period is based on the code printed on your white law label as indicated on the Warranty Code Chart. The duration of any applicable implied warranties, including but not limited to the implied warranties of merchantability and fitness, shall not exceed the term of this limited warranty. (Some states do not allow limitations on how long an implied warranty lasts, so this limitation may not apply to you.) Serta® shall not be liable for incidental or consequential damages that result from the use of your Serta® product. (Some states do not allow the exclusion or limitation of incidental or consequential damages, so this exclusion may not apply to you.) No expressed or implied warranties are extended to persons who purchase the product from anyone other than Serta Simmons Bedding Company or its authorized dealers, and all warranties to such persons, including the implied warranties of merchantability and fitness, are hereby excluded.


If your Serta® mattress or foundation fails due to a manufacturing defect, the exclusive remedy under this warranty will be replacement of the defective product in the U.S., Puerto Rico or U.S. Virgin Islands. If the Serta® product you purchased is discontinued at the time of replacement, a current model of comparable quality and value will be selected. To receive service under the terms of this warranty contact your original Serta® dealer. If your original Serta® dealer is no longer in business or you have moved outside the service area, please contact Serta Customer Service at 1-888-55-SERTA (1-888-557-3782) between the hours of 9am to 5pm EST Monday - Friday. A copy of original bill of sale is needed to determine original date of purchase. Model name label and law label must be provided to identify the bedding and validate this warranty.


This warranty gives you specific rights, and you may have other rights, which vary from state to state. This warranty is extended only to the original purchaser from Serta Simmons Bedding Company or its authorized dealers.


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