Most common 
Passaic, New Jersey · Est. for the community
Every thread checked, before you wear it.
Certified shatnez testing for suits, coats, dresses and more. Bring your garments to our Passaic lab, or mail them from anywhere in the world — we test them by hand and send them back with a certificate.
Tested by hand, garment by garment
Ships worldwide, both ways
Certificate with every garment
Every fiber
Linings, padding, canvas, thread & trim — all examined
2–4 days
Typical turnaround once your garments arrive
Worldwide
Mail-in from any country — we return it to you
Certified
A written certificate accompanies every garment
The process
From your closet to certified — in four steps
Whether you drop off in Passaic or mail in from across the globe, the path is the same. No guesswork, no shortcuts.
1 Choose
Pick your garments
Select each item below and add it to your order — suits, coats, dresses, ties and more. Adjust quantities anytime.
2 Send
Drop off or mail in
Bring them to 70 Tennyson Place, or ship them to our lab from anywhere. We'll guide you on safe packaging and the return label.
3 Test
Expert hand-testing
We open and inspect the hidden areas where wool and linen hide, and remove or correct any shatnez found.
4 Receive
Back to you, certified
Your garments return to you with a certificate confirming they were tested and are ready to wear.
Services & pricing
Don't see your item? Call us
Choose what needs testing
Per-garment pricing, no surprises. Add items to your order and check out — then drop off or mail in.
A second jacket, an extra pair of pants, a child's suit — orders of any size are welcome. International clients, see mail-in & return shipping.
Understanding the mitzvah
What is שַׁעַטְנֵז?
Shatnez is the Torah prohibition against wearing wool and linen woven together in a single garment. The challenge is that these fibers are rarely on the label — they hide in canvassing, shoulder padding, linings, reinforcement tape and the very thread that holds a suit together.
That's why a garment can be "100% wool" on the tag and still contain shatnez. The only way to know with certainty is to open the hidden areas and examine the fibers directly — which is exactly what testing is for.
A label tells you what's advertised. Testing tells you what's true.
Wool — the warm fiber
Common in suits, jackets, overcoats and winter dresses, often in places you can't see from the outside.
Linen — the hidden one
Frequently used in chest canvas, interfacing and stitching, where it quietly creates a shatnez problem.
Testing — the certainty
We identify the fibers, locate any forbidden combination, and make the garment permissible to wear.
For clients everywhere
Worldwide mail-in, to the lab and back
You don't have to live in Passaic to use us. Clients across the country and around the world send garments to our laboratory and receive them back, tested and certified.
Send it in
Place your order, then ship your garments to 70 Tennyson Place, Passaic, NJ 07055. We'll confirm safe packaging so nothing is damaged in transit.
We test it
Each garment is examined by hand. We handle domestic and international packages, and keep you updated on status and results.
Back to your door
We return your garments with a certificate. Add prepaid return shipping at checkout; international return is quoted by destination.
Shipping & payment
Pay once — we handle the label
Checkout collects your testing fee and round-trip shipping together, so there's nothing extra to arrange. Here's exactly what happens.
1 Pay
Order & pay online
Add your garments and check out securely by card or PayPal. The total covers testing plus round-trip shipping. Enter the address where you'd like your garments returned.
2 Print
Get your shipping label
We email you a prepaid label. Print it, tape it to your package, and drop it at the carrier — no postage to buy, nothing to weigh.
3 Return
Back to you, certified
We test, then return your garments with a prepaid label and a certificate confirming they're ready to wear.
United States
You pay testing + a flat round-trip fee at checkout. We email a prepaid label to send your garments in, and your items come back with a prepaid return label and certificate. Simple and fully covered.
International
You ship to our lab using your local carrier (we can't pre-pay an overseas pickup). We then quote and arrange the return to your country. Questions before sending? Contact us and we'll walk you through it.
Why Passaic Shatnez
Careful work the community trusts
Thorough, not rushed
We check the places shatnez actually hides — canvas, padding, linings and thread — not just the obvious seams.
Garments come first
Your suit or dress is treated with care and returned in the condition it arrived — neatly handled and ready to wear.
Discreet & reliable
Drop-off, pickup or mail-in — straightforward service, clear pricing, and results you can count on for any occasion.
Questions, answered
Frequently asked
What is shatnez, exactly?
Shatnez is the Torah prohibition against wearing wool and linen together in one garment. Because fibers are often hidden in linings, padding, canvas and thread, a garment can contain shatnez even when the label doesn't mention it. Testing is the only way to know for certain.
How does the mail-in service work?
Choose your garments and place an order, ship them to our Passaic laboratory, and we test each one by hand. We then mail your garments back with a certificate. We serve clients worldwide — see the mail-in section for details on return shipping.
Which garments should be tested?
Suits, sport jackets, overcoats, dresses, skirts, vests and neckties most often contain wool or linen and should be checked before wearing. When in doubt, it's worth testing — call us if you're unsure about a specific item.
How long does it take?
Most garments are tested within a few business days of arrival. Need it for a wedding, bar mitzvah or Yom Tov? Rush service is available — call us to arrange it.
Do you ship internationally?
Yes. We accept garments from anywhere in the world. Mail them to our lab and we'll return them to you with results. International return shipping is quoted based on your destination.
How do I get a shipping label to send my garments?
U.S. customers: after you order and pay online (testing + round-trip shipping), we email you a prepaid label. Print it, attach it to your package, and drop it off — there's no postage to buy. We return your garments with a prepaid label and a certificate. International customers ship to us with their local carrier and we quote the return.
What if shatnez is found in my garment?
In many cases the forbidden combination can be removed or corrected so the garment becomes permissible to wear. We'll explain what we found and the options before any work is done.
Visit, call, or ship
Get in touch
Laboratory & drop-off
70 Tennyson Place
Passaic, NJ 07055
Passaic, NJ 07055
Call or text
Hours
- Sunday – Thursday9:00 AM – 6:00 PM
- Friday9:00 AM – 1:00 PM
- Shabbos & Yom TovClosed