Theseus Series IWB Concealed Carry Holster
The Theseus Series holster is built for concealed carriers who want a dependable, streamlined setup for everyday use. Designed with a slim profile and durable Kydex construction, this holster offers secure retention, consistent draw performance, and all-day comfort.
Whether you carry daily or train regularly, the Theseus Series provides a reliable platform that keeps your firearm secure and accessible without unnecessary bulk.
Built for Everyday Carry
A reliable inside-the-waistband holster should stay comfortable and consistent throughout the day. The Theseus Series is designed to balance concealment, retention, and stability so you can carry with confidence.
Ideal for:
Daily concealed carry
Appendix or strong-side carry
Range training
Defensive setups
Minimalist carry configurations
Its streamlined design helps reduce printing while keeping your firearm positioned securely.
Slim, Durable Kydex Construction
Constructed from precision-formed Kydex, the Theseus Series holster maintains its shape and retention through long-term use. Kydex provides a dependable hold on your firearm while resisting sweat, moisture, and everyday wear.
Benefits of Kydex:
Consistent retention
Lightweight design
Sweat-resistant material
Easy maintenance
Long-term durability
This holster is built for real-world use, not just range days.
Secure Retention & Stability
Retention and stability are critical for concealed carry. The Theseus Series is designed to keep your firearm secure while allowing a smooth, predictable draw when needed.
Features include:
Adjustable retention
Secure belt clip attachment
Stable positioning
Slim concealment profile
Designed for consistent draw
This setup helps reduce shifting throughout the day and maintains a reliable carry position.
Comfort for All-Day Wear
Comfort matters when you carry daily. The Theseus Series is shaped to sit naturally inside the waistband while minimizing pressure points. Its low-profile design helps it stay discreet under everyday clothing.
Whether sitting, driving, or moving throughout the day, the holster remains stable and comfortable.
Handmade for Reliability
Every Neptune Concealment holster is built with attention to detail and durability in mind. The Theseus Series is made for users who rely on their gear daily and need dependable performance from their carry system.
Why Choose the Theseus Series?
A minimalist IWB holster keeps your carry setup simple, secure, and consistent. The Theseus Series provides the essential features concealed carriers need without unnecessary bulk.
If you want a clean, dependable holster designed for real-world concealed carry, this series delivers.
Order the Theseus Series Holster
Upgrade your concealed carry setup with a slim, durable holster built for everyday reliability. The Theseus Series is designed for users who demand comfort, retention, and performance from their carry gear.
corey schnagl (verified owner) –
Amazing quality custom holster. After drooling over these holsters for a long time I finally bit and ordered. After contacting them about changing my mind on a few things I settled on a red and black carbon fiber combo. I also had him match a wallet to the same combo. I was blown away by the quality once I got it! I wore it around the house for a day and love it. It is very comfortable. I can’t wait to take it to the range.
joshuaputnam (verified owner) –
This will be my 5th holster from neptuneconcealment and this holster gave me my first problem. I really hated the color. I emailed them and they said they’d remake it right away. Sent the old one back and got the new holster in about a week. These guys care about their product and customer satisfaction. Love the new holster and as always top notch build quality.
lrichter784 (verified owner) –
Mine took alittle long then normal to get here, but to be expected with current events. I won’t hold it against them. The quality is awesome and I am very pleased with the final product. Fitment it excellent with the light and red dot cut. Top notch
Mark (verified owner) –
Beautiful holster. Perfect fit for my P320XCarry with Olight Baldr Mini. Love the fact that it can be worn inside or outside with extra clips. Just ordered another for my P365XL, along with some extra clips. Was at my door 3 weeks after placing order. Faster than other places I have ordered custom holster from. And these guys offer options that others don’t. And the fact that they are run by veterans…even better.
Nestor Mena (verified owner) –
Love my new Theseus series dual color holster. Great quality and workmanship fits my H&K P30L like a glove. I looked around and went with Neptune for the variety of styles and looks that I liked. You offer more options for carry with different builders accessories to add. Plus the fact it’s Veteran owned and made in the USA!
Also love my new wallet and extra belt loop. You guys rock! Will definitely be back.
Jason Fuller (verified owner) –
Great product, I have bought about 5 holsters for my P365XL now in the past month. It has taken over a year to find a vendor that makes a holster that perfectly fits my firearm, optic, and light. Quality is great and feel confident carrying with it.
Mars Dukes (verified owner) –
I had a special request for my PSA Full size Dagger S. You guys hit the mark. Quality and aesthetics are phenomenal. Fit Is perfect and retention is great. Excellent craftmanship. Will be purchasing more for myself and gifts for my family.
Nathan Simms –
Insane build quality and the holster looks great. 5th holster from these guys so far. I won’t go anywhere else. Great customer service and top notch company.