Written and maintained by CASRAI Editorial Board
Last updated
This page describes products and general use; it is not medical advice.
A vinyl mattress cover is a waterproof layer fitted over a mattress. In health care it is treated as a moisture-resistant mattress cover: its job is to keep body fluids out of the mattress, and it only does that while the surface stays intact and is cleaned with products that do not damage it. In the United States, a “mattress cover for medical purposes” is a Class I device under FDA rules, and CDC infection-control guidance sets the care rules. Both are written by function rather than by material, so they apply whether a cover is sold as vinyl or described in other terms.
Who uses it: clinic and ward staff, infection preventionists, procurement staff and students who need to know what a medical mattress cover is and how federal guidance expects it to be maintained.
What a medical mattress cover is
FDA defines it in 21 CFR 880.6190: “A mattress cover for medical purposes is a device intended for medical purposes that is used to protect a mattress.” The regulation notes that such a cover may be electrically conductive or may contain a germicide (eCFR, checked 2026-10-30).
CDC describes the same idea in practical terms: “A mattress cover is generally a fitted, protective material, the purpose of which is to prevent the mattress from becoming contaminated with body fluids and substances.” It adds that “a linen sheet placed on the mattress is not considered a mattress cover” (CDC Guidelines for Environmental Infection Control in Health-Care Facilities, checked 2026-10-30).
Why the cover matters
CDC states that standard mattresses and pillows “can become contaminated with body substances during patient care if the integrity of the covers of these items is compromised,” and that wet mattresses “can be a substantial environmental source of microorganisms.” The guideline describes outbreaks linked to contaminated mattresses, including Acinetobacter, MRSA and Pseudomonas aeruginosa, particularly among burn patients, and reports that removing wet mattresses was effective in controlling them.
Regulation in the United States
- Classification: Class I (general controls).
- Premarket notification: exempt from the premarket notification procedures in subpart E of part 807, subject to the limitations in 21 CFR 880.9.
- Quality system: when the cover is not labeled or represented as sterile, it is exempt from the part 820 quality system requirements except records and complaint files (820.35).
- Limit on the exemption: under 21 CFR 880.9, the exemption applies only to the extent the device has the existing or reasonably foreseeable characteristics of commercially distributed devices of that generic type.
For background on how these categories work, see FDA medical device classification, 510(k) and PMA and FDA 510(k) premarket notification.
Types and variants
| Type | What the source says | Source |
|---|---|---|
| Moisture-resistant (impermeable) cover | Cleaned and disinfected between patients with an EPA-registered product, if available, compatible with the cover material. | CDC, recommendation G.VII.D |
| Cover made completely of fabric | Changed and laundered between patients. | CDC, recommendation G.VII.E |
| Electrically conductive cover | Named in the FDA identification as a possible form of a mattress cover for medical purposes. | 21 CFR 880.6190(a) |
| Cover containing a germicide | Named in the FDA identification as a possible form of a mattress cover for medical purposes. | 21 CFR 880.6190(a) |
| Antimicrobial-treated mattress or article | CDC cautions that EPA has not approved public health claims for antimicrobial-treated articles, mattresses included. | CDC, environmental infection control guideline |
How to choose
The federal sources give no sizes, thicknesses or material ratings, so they cannot rank one cover over another. What they do state is what a cover must be able to do in use:
- It must be moisture-resistant if it is meant to keep fluids out of the mattress; a fabric-only cover follows a launder-between-patients rule instead.
- It must tolerate the disinfectants the facility uses. CDC recommends EPA-registered disinfectants compatible with the cover materials, to prevent tears, cracks and holes.
- It must be a fitted protective cover, not a linen sheet.
Product labeling and the manufacturer’s instructions for use are the place to confirm material compatibility for a specific cover.
Cleaning, replacement and safe handling
CDC recommendations for mattresses and covers (category in brackets):
- Keep mattresses dry; discard them if they become and remain wet or stained, particularly in burn units (IB).
- Clean and disinfect moisture-resistant covers between patients using an EPA-registered product, if available (IB).
- Use disinfectants compatible with the cover materials, so covers stay impermeable to fluids (IB).
- Maintain the integrity of mattress and pillow covers; replace a cover that is torn or in need of repair (II).
- Do not stick needles through the cover (II). CDC also says the practice of sticking needles into the mattress should be avoided.
- Replace a bassinet mattress if its cover surface is broken.
Related reading: disinfection and the Spaulding classification, underpads, hospital beds and healthcare-associated infection definitions.
Common mistakes
- Patching a tear. CDC states that patches for tears and holes do not provide an impermeable surface; covers should be replaced when torn, and the mattress replaced if it is visibly stained.
- Treating a linen sheet as a cover. CDC does not consider a linen sheet placed on the mattress to be a mattress cover.
- Using incompatible disinfectant. Products that damage the cover material can lead to cracks and holes that let fluids reach the mattress.
- Puncturing the cover with needles. CDC recommends against it.
- Relying on antimicrobial treatment. CDC notes EPA has not approved public health claims for antimicrobial-treated mattresses.
FAQ
Is a vinyl mattress cover a medical device?
A cover intended for medical purposes to protect a mattress is a medical device under 21 CFR 880.6190: Class I, exempt from 510(k) premarket notification within the limits of 21 CFR 880.9. The rule is written by function, not by material.
Can a torn mattress cover be repaired with a patch?
CDC says patches do not provide an impermeable surface and recommends replacing a torn cover.
How should a moisture-resistant cover be cleaned?
CDC recommends cleaning and disinfecting it between patients with an EPA-registered product, if available, that is compatible with the cover material.
Is a fitted sheet the same as a mattress cover?
No. CDC does not consider a linen sheet placed on the mattress to be a mattress cover.
Sources
- U.S. FDA / eCFR, 21 CFR 880.6190, Mattress cover for medical purposes, checked 2026-10-30.
- CDC, Guidelines for Environmental Infection Control in Health-Care Facilities (2003, last update July 2019), section on standard mattresses, pillows and air-fluidized beds, checked 2026-10-30.
