Care Medical Source will be closing effective 10/30/20 at 5:00 pm PST. We are no longer accepting online orders; however, limited ordering is available by phone at 800-443-7091 until that time. It has been an honor to serve your home medical equipment and supply needs for the past 33 years and we wish you well. Please contact us if you have any questions.

Invacare Matrx PB Deep Heavy Duty Back

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The Invacare Matrx PB Deep Heavy Duty Wheelchair Back features a lightweight, slightly contoured ABS shell with molded foam that wraps around the shell for maximum comfort and midline support and positioning. The heavy-duty hardware and 500 lb. weight capacity makes this an ideal wheelchair back support for larger users. 

The 7” contour depth provides higher lateral and trunk support and the removable lumbo-sacral support is easily adjustable to meet individual user needs. Optional Visco Foam or Foam-in-Place Kit is available for added comfort and a more custom fit to contours of the body. 

Heavy-duty, quick-release, Easy Set hardware makes installation and removal of the back a breeze and allows for quick adjustments in depth (4”), angle (40°) and rotation while the user is still in the wheelchair. 

The outer cover of this bariatric wheelchair back wraps around the entire back and is made from Meshtex fabric that helps wick away moisture and heat to keep you cool and dry.

Other options and accessories including a privacy flap, wipeable slipcover and military service emblems are available so you can build your PB Deep Heavy Duty foam wheelchair back to meet your specific needs. See the Options tab above for more information.

Product Features:

  • Lightweight, slightly contoured ABS shell
  • Shell includes built-in headrest attachment
  • Molded foam wraps around the back shell with hook and loop strips
  • 7" of contour depth provides higher lateral and trunk support
  • Removable lumbo-sacral support adjusts to meet individual needs
  • Quick-release, heavy-duty, Easy Set hardware makes installation, removal and adjustments simple
  • Adjustments in depth (4”), angle (40°) and rotation can be made while the user is in the wheelchair
  • Meshtex outer cover is breathable and moisture-resistant
  • Several options and accessories to choose from - see the Options tab above
  • Weight capacity 500 lbs.
    • also available in a standard model (Matrx PB Deep) with a weight capacity of 300 lbs.

Looking for a replacement or spare cover for your Invacare Matrx PB Deep Heavy Duty Back? CLICK HERE

Care Medical Source offers a variety of wheelchair cushionswheelchair backs and seating accessories. Can't find what you're looking for? Give us a call at 1.800.443.7091 and we'll be happy to help.

 Construction:  Shell: Lightweight, ABS contoured with built-in headrest attachment
 Hardware: Easy Set Heavy-Duty, Quick-Release 
 Foam: Molded high-resiliency foam wraps around shell (upgrade options available)
 Cover: Wraparound moisture-resistant Meshtex fabric
 Width:  20" | 22" | 24"
 Height:  16" | 20"
 Depth Adjustment:  4" (2" in front or behind)
 Contour Depth:  7"
 Angle Adjustment:  40° range
 Fits onto Back Canes:  Fits 1" narrower up to 1" wider 
 Weight:  7 lbs. and up depending on size
 Weight Capacity:  500 lbs.
 Warranty:  2 year limited

Options & Accessories

  • Visco Foam (PBVF): Provides a 3/4" layer of visco foam laminated onto a 1" layer of high resiliency foam for increased immersion and comfort.

  • Foam-in-Place Kit (FP64A): Allows foam to be molded to the user's shape for a more custom fit.

  • Privacy Flap (PFLAP-size): Covers the gap between the bottom of the backrest and the seat pan of the wheelchair. Size will be ordered to match chosen back size:
    • Large (PFLAP-L): 17" x 16" to fit 19"-20" wide backs
    • X-Large (PFLAP-XL): 19" x 16" to fit 21"-22" wide backs
    • XXL-Large (PFLAP-XXL): 21" x 16" to fit 23"-24" wide backs

Additional Cover Options

*Back will come with standard Meshtex cover - these are additional cover choices:

  • Stretch Cover(PBSC): For use when utilizing the Foam-in-Place Kit.

  • Wipeable Slipcover WSCU): Additional cover with zipper adds a layer of protection for the back cover and foam. Ideal for those with incontinence issues.

Military Service Emblem Options

6" diameter embroidery patch available for the following service branches:

  • Army
  • Navy
  • Air Force
  • Marines


Most items purchased from Care Medical Source are returnable within 30 days of the date of purchase if the item is in new, resalable condition and in its original packaging containing all parts and accessories. Some items are non-returnable for hygienic reasons or if the item was custom-made by the manufacturer to your specifications. Exceptions would be if the item(s) received were different than the item(s) ordered. We support the products that we sell by honoring all manufacturer warranties; however, each manufacturer has different warranty policies and procedures. Please view our Return/Warranty Policy for additional information.