Glass-free all the way through
Silica-encased rayon is flame resistant by nature. There's no textile fiberglass and no topical FR chemical to wash out or wear off, and nothing sheds when a cover comes off.
FR mattress socks for manufacturers
FR mattress socks.
Every size.
In stock.
Silica-encased rayon knit socks from Twin to Cal King: inherently flame resistant, glass-free, and pulled on in seconds. Every spec is on the page, and every shipment comes with the paperwork for your 1633 file.
- Glass-free, inherent FR
- No topical FR chemicals
- Roll-pack ready
- No sewing or stapling
6
stocked sizes, Twin to Cal King
0%
fiberglass
[X] days
to ship stocked sizes
1 day
to a real quote
Sizes & specs
The spec sheet is the homepage.
Most barrier suppliers make you call for dimensions. Ours are right here: every stocked size, the mattress heights it fits, and how it ships.
| Size | Fits mattress | Heights | Case pack | SKU |
|---|---|---|---|---|
| Twin | 38 × 75 in | [8–14 in] | [X] / case | FS-T |
| Twin XL | 38 × 80 in | [8–14 in] | [X] / case | FS-TXL |
| Full | 54 × 75 in | [8–14 in] | [X] / case | FS-F |
| Queen | 60 × 80 in | [8–14 in] | [X] / case | FS-Q |
| King | 76 × 80 in | [8–14 in] | [X] / case | FS-K |
| Cal King | 72 × 84 in | [8–14 in] | [X] / case | FS-CK |
Split kings, custom sizes and private-label tags are available. Tell us your build.
Quote these sizes
CALIFORNIA AB 1059
01.01.27
Fiberglass is out. Is your barrier?
Starting January 1, 2027, California bans textile fiberglass in mattresses and their components. If fiberglass is anywhere in your FR barrier, you need a new one qualified before then. FireSocks are glass-free, so starting a sample run now keeps your 2027 production on schedule.
Why FireSocks
Built for the line, not the lab.
Corners that stay square
Knit to stretch over the core and recover, so corners hold their shape instead of rounding off under the ticking.
On in seconds
One person, no sewing, no stapling, no separate skirt. A sock goes on faster than a wrap and keeps the line moving.
Made for roll-pack
Built to be compressed, rolled and boxed, then recover on the customer's floor without splitting or bunching.
Same sock, every lot
Every carton carries a lot number tied to its yarn and knit run. What passed your prototype is what ships next quarter.
Invisible under the cover
A soft, low-profile hand that won't telegraph through stretch-knit ticking or add bulk to the quilt.
The difference
Buying a barrier shouldn't take five calls.
Fire barriers are a commodity until one fails your burn test or misses a truck. Here's how we take the guesswork out.
| What you need | Typical barrier supplier | |
|---|---|---|
| Sizes and dimensions | Published on the site | Call for details |
| MOQ and lead time | Printed on every product | Revealed after a sales call |
| Prototype samples | Free, shipped in [X] days | Weeks, sometimes billed |
| Compliance paperwork | Spec sheet, SDS and lot data with every order | On request, eventually |
| Fiberglass | None, in writing | Often still in the blend |
| What it's made of | Silica-encased rayon, stated on every spec sheet | Often not stated |
| Fiberglass-free badge | FiberglassFree™ mark included free | Certify and pay for it yourself |
| Reordering | Online portal with net terms | Email a PO and wait |
| Getting a quote | A real number within 1 business day | "Someone will reach out" |
How it works
From spec to steady supply.
-
Step 1
Spec it
Tell us size, height, construction and monthly volume. It takes about two minutes.
-
Step 2
Sample it
Free samples ship for your prototype build, enough for a full 1633 test set.
-
Step 3
Qualify it
You test your prototype. We send the barrier details your CPSC prototype record asks for: fiber content, weight and supplier information.
-
Step 4
Order it
Cases or pallets, on net terms once you're approved. Reorder from the portal in a minute.
Your compliance file
The paperwork, done before you ask.
Your 1633 prototype record has to identify every barrier in the build. We hand you that information up front, so qualifying a new barrier is an afternoon of filing, not a month of emails.
-
With every order
Spec sheet
Dimensions, weight, fiber content and stretch for every SKU.
-
With every order
Safety data sheet
Current SDS for the barrier fabric.
-
On request
Barrier test summary
Results from our own test builds, so you know where to start. Your finished mattress still needs its own prototype test.
-
With every order
Glass-free statement
A signed statement that the sock contains no textile fiberglass, ready for your California files.
-
On every carton
Lot traceability
A lot number on every carton, tied to yarn and knit records.
INCLUDED WITH EVERY ORDER
Customer bonus
Your mattress earns the FiberglassFree™ badge. Free.
Build with FireSocks and your qualifying models can carry the FiberglassFree™ certified-product mark on labels, packaging and listings. No application fee and no separate audit. Register the model with us and you're set.
- Badge files in PNG, JPG, AI, EPS and PDF
- Use on labels, boxes and listings
- No fee and no separate audit
- Usage terms in plain English
Applies to mattress models that use FireSocks as the fire barrier and contain no textile fiberglass in any other component.
Who we supply
Made for the people who make mattresses.
Mattress manufacturers
A dependable primary or second source. Stocked sizes and consistent lots for high-volume lines.
Bed-in-a-box brands
Socks that survive compression and roll-pack, priced for DTC margins.
Contract & private-label plants
One barrier across many customers' builds, with clean paperwork for every brand's file.
Specialty sleep
RV, marine, hospitality and custom sizes. Send us the dimensions and we'll quote them.
Straight answers
Questions buyers actually ask.
Don't see yours? Call us. A person picks up.
Is a FireSocks sock "16 CFR 1633 certified"?
No barrier is certified on its own, and any supplier who says so is overselling. 16 CFR 1633 tests the finished mattress: peak heat release has to stay under 200 kW, and total heat release under 15 MJ in the first 10 minutes of a 30-minute open-flame test. Your prototype has to pass with our sock in it. We make that easy with free samples, our own test-build data and the barrier details your prototype record requires.
What are FireSocks made of?
Silica-encased rayon, knit into a stretch sock. The flame resistance is inherent to the fiber: when the sock meets an open flame, it forms a protective char layer instead of feeding the fire. There's no fiberglass and no topical FR chemical treatment, so there's nothing to wash out, wear off or shed.
Is there any fiberglass in your socks?
No. FireSocks are glass-free, and we'll put that in writing for your files. That matters even more now that California's fiberglass ban takes effect on January 1, 2027.
Can we market our mattress as fiberglass-free?
Yes. Every FireSocks customer can put the FiberglassFree™ certified-product badge on mattress models that use FireSocks as the fire barrier and contain no textile fiberglass anywhere else. Register the model with us, download the brand kit, and use the badge on labels, packaging and listings at no extra cost. See who qualifies.
What sizes and heights do you stock?
Twin, Twin XL, Full, Queen, King and Cal King, for mattresses [8–14 in] tall. Split kings and custom sizes are available on request.
What's the minimum order?
[X] cases per size for production orders. Samples have no minimum.
How fast do you ship?
Stocked sizes ship in [X] business days. Custom sizes take about [X] weeks. Pallet orders ship LTL.
Do samples cost anything?
Not for manufacturers running a prototype. We send enough for a full test set at no charge.
Sock or cap: which should I use?
A sock covers the whole core in one pull-on piece, with no skirt to align and no seams to sew. If you run caps today, we'll sample a sock against your current build so you can compare install time and burn results side by side.
Do you offer net terms?
Yes. Approved accounts get net 30 and can reorder online. Applying takes about five minutes.
Can you put our brand on the tag?
Yes. At production volume we can print your brand on the hangtag and carton label.
Send us your spec. Get a real quote.
Size, height and monthly volume are all we need to start.