Kydex Thickness Explained: .060 vs .080 and Why It Matters for IWB Carry

The Spec Most New Carriers Never Read

Two holsters look identical on a product page. Same pistol fitment, same sweat shield, same clip style. One feels solid and clicks crisply when you reholster. The other feels slightly soft, like plastic packaging from the grocery store, and wears loose within a year.

The difference is usually Kydex thickness, measured in thousandths of an inch. The two numbers you'll see almost everywhere are .060 and .080. This guide explains what those numbers mean, how they change the way a holster performs, and which thickness is right for an IWB carrier.

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What "Kydex" Actually Is

Kydex is a brand of thermoplastic sheet. Most quality holster manufacturers use it or an equivalent (Boltaron, Holstex). The material is heated, pressed over a gun-shaped mold, cooled, and trimmed. The result is a rigid, precisely shaped shell with consistent retention across every unit.

Thickness refers to the raw sheet that goes into the press. After forming, the shell retains that same wall thickness across the holster body. A .060 holster is built from a sheet six hundredths of an inch thick. A .080 holster is built from a sheet eight hundredths of an inch thick. That sounds small. In practice it's a noticeable difference in every meaningful way.

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.060 Kydex

The thinner of the two standard options.

Pros

• Lower profile. Thinner walls mean the holstered gun takes up less space inside your waistband. For deep-concealment IWB, those thousandths of an inch add up.
• Lighter. A .060 IWB holster can weigh noticeably less than a .080 version of the same design.
• Slightly more flexible. Forms to the curve of your body fractionally better.

Cons

• Less durable over years of daily carry. Edges can chip or flex over time.
• Can lose retention faster. Thinner walls flex more when you draw, and cumulative flex changes the grip of the shell on the gun.
• Less crisp reholster click. The "snap" when the gun clicks into retention is quieter and softer.

When .060 Is Right

• Smaller guns (Glock 43, Sig P365, Hellcat, LCP).
• Deep concealment priorities, such as appendix carry with a tucked shirt.
• Carriers who rotate between multiple holsters and don't put any single one through daily wear for years.

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.080 Kydex

The thicker option, and the default for most premium holster manufacturers.

Pros

• More durable. Walls resist chipping, scuffing, and long-term flex.
• Crisper retention. The shell holds its molded shape longer, so retention stays consistent over years.
• Louder, more confident reholster click. Many carriers rely on that audible click to confirm the gun is seated correctly.
• Better edge stiffness. Opening lips and sweat shield edges hold shape better.

Cons

• Slightly bulkier. Not much, but measurable if you care about every millimeter.
• Marginally heavier. Usually not noticeable on the belt.
• Takes a fraction longer to "break in" to your specific gun, though break-in isn't really required for Kydex the way it is for leather.

When .080 Is Right

• Full-size and compact pistols (Glock 17, Glock 19, M&P 2.0, Sig P320).
• Carriers who plan to put a single holster through years of daily wear.
• Anyone prioritizing long-term retention consistency over minimal profile.

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The Short Version

Carry Priority	Thickness
Deep concealment, small gun	.060
All-day carry, compact or full-size	.080
Years of daily wear	.080
Minimal profile AIWB with micro pistol	.060
First IWB holster for most carriers	.080

For the average new IWB carrier, .080 is the safer default. The durability and retention consistency outweigh the tiny profile savings of .060.

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What About Thicker Than .080?

Some duty holsters use .093 or even .125 Kydex. For IWB carry, that's almost always too thick. The shell becomes too stiff to conform to body contours, and the extra material adds bulk you notice through a shirt.

Stick with .080 for IWB unless you have a specific reason to go thinner.

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What About Thinner Than .060?

You'll occasionally see bargain holsters made from .040 Kydex. Avoid them. The walls flex enough that retention is unpredictable, the shell deforms under belt pressure, and durability is poor. The small price savings isn't worth the consequences.

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How to Tell What Thickness a Holster Is

Any quality manufacturer publishes the thickness spec. If a listing doesn't mention it, email the seller. A holster maker who won't tell you the Kydex thickness is usually using thinner material than a reputable competitor.

Some visual cues on a finished holster:

• .080 has slightly rounded, substantial-feeling edges. You can squeeze the shell and feel resistance.
• .060 flexes noticeably when pressed. Edges are thinner and sharper.

Hold both in hand once and you can tell them apart for the rest of your life.

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Does Thickness Change Retention Tuning?

A little. Thicker shells hold the molded retention points more consistently, which means the retention screw does less work. Thinner shells rely more on the screw. Both can be tuned to work well. Thicker shells simply hold that tuning longer.

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Common Misconceptions

"Thicker means safer." Thickness doesn't change trigger coverage or the fundamental safety of the holster. A properly molded .060 shell with full trigger coverage is just as safe as a .080 version. Safety comes from design and precision, not thickness.

"Thinner conceals drastically better." The difference is fractions of an inch. Belt, holster design, and clothing choice matter far more than the thickness of the shell walls.

"Kydex is Kydex." Not all thermoplastic sheets are equal. Quality manufacturers use genuine Kydex, Boltaron, or Holstex. Generic imports can use brittle or inconsistent material that looks identical at first glance.

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Frequently Asked Questions

Is .080 too stiff for a small subcompact like a Glock 43?

No. .080 works fine on subcompacts. Some makers choose .060 on micro pistols purely for profile. Both thicknesses can be molded to fit the same gun correctly.

Will a .080 holster break in over time?

Not in the way leather does. Kydex maintains its shape indefinitely under normal carry. The retention points can relax slightly after thousands of draws, which is why adjustable retention screws exist.

Do I need to care about thickness if I carry a cheap holster?

Yes, arguably more. Cheap holsters are often thin, inconsistent, or use off-brand material that fails in heat. If you're on a budget, buy a well-built .080 holster from a reputable maker rather than a thicker one from an unknown manufacturer.

Can I see the thickness on my holster?

Sometimes it's stamped on the inside, but usually not. Go by the manufacturer's spec.

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The Bottom Line

For most IWB carriers, .080 Kydex is the right default. It gives you long-term durability, consistent retention, and a crisp reholster click without meaningfully increasing profile. Save .060 for deep-concealment setups with micro pistols where every millimeter matters.

Front Line IWB Holsters are precision-molded with quality thermoplastic to hold retention consistently from day one through years of daily carry, with a built-in sweat shield and adjustable retention screw so your fit stays dialed in.

Shop Front Line IWB Holsters on Amazon →

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Related Reading

• Kydex vs Leather IWB Holster: Which Material Is Better?
• Most Comfortable IWB Holster: What Actually Matters
• How to Choose the Right IWB Holster
• Concealed Carry for Beginners: Your First IWB Holster Guide