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Concealing Communications Tools: The Essential Guide to Using Undertac Tactical Underwear

Writer: Jonny S. Jonny S.

Updated: 14 hours ago

Disclaimer: This article is for educational purposes only. We do not recommend attempting any practices described herein, nor experimenting with the items discussed. If you choose to do so, you proceed at your own risk and accept all liability. Never carry sharp objects or anything that could be considered dangerous or repurposed from its original intent without proper authorization.


Sierra Whiskey Co. and Undertac Tactical Underwear plus other gear

Why Conceal Communications?


Concealing communication tools might seem unusual, but it is crucial. Sometimes, survival depends on what you can carry without drawing attention. This is especially true for journalists, travelers in unstable areas, or Special Forces operators. Concealed communications can be a lifeline in high-stakes situations.


In the realm of tradecraft, communication tools—like micro SD cards or encrypted USB drives—hold vital information. This could include escape plans, emergency contacts, or proof of identity. During the Cold War, spies utilized microdots, tiny photographs that transmitted messages. Nowadays, a micro SD card, smaller than your fingernail, can store vast amounts of data. Getting caught with it in a tense situation may lead to serious consequences.


For travelers, protecting financial information is also key. Imagine needing funds suddenly, only to find your wallet has been taken. A crypto wallet's private key stored on a micro SD card ensures you can access your digital assets. Concealing this data guarantees you are not left without resources, even in a crisis. That's where Sierra Whiskey Co.'s Undertac Infantry, Recon, and Sortie come into play. Designed for Special Forces operators, this tactical underwear uniquely focuses on comfort and survival. The E&E pocket, disguised as a tag on the waistband, allows you to carry essential tools discreetly.


Choosing the Right Communication Tools


Key Options to Consider


When selecting your communication tools, opt for small, lightweight, and non-metallic items:


  • Micro SD Card: Store encrypted data, including maps, contacts, or a crypto wallet seed phrase. Use a thin plastic sleeve to prevent damage.

  • Encrypted USB Drive: Choose a micro-sized drive (around 1” long) for larger files, such as a crypto wallet backup. Secure it with tape to avoid rattling.

  • Handwritten Note: A folded piece of paper with a contact number—laminate it for durability.


All these items should fit comfortably in the Undertac’s E&E pocket. Add a folded $100 bill for added camouflage. This cash can provide flexibility in emergency situations, as noted in our “Origins of the Best Travel Underwear”.


Preparing the Undertac Infantry E&E Pocket


Step-by-Step Guide


The E&E pocket on the Undertac Infantry is revolutionary for tradecraft. It can hold up to $500, a handcuff key, or a micro SD card without bulging. Here’s how to prepare it:


  1. Wrap the Item: Use waterproof tape to secure the item and minimize movement.

  2. Strategic Layering: Place the communication tool between two $100 bills. This makes it less obvious if someone checks your belongings.

  3. Ensure a Secure Fit: Make sure the pocket is filled snugly. The modal fabric of Undertac is moisture-wicking and comfortable, keeping the tools discreet even during prolonged wear.


Pro Tip: Always wear Undertac Infantry as your base layer when traveling. Its moisture-wicking properties keep you comfortable, whether you're traversing jungles or queuing in airports. A concealed micro SD card with your crypto wallet seed phrase can be a lifesaver if your primary wallet goes missing.


Concealing During High-Risk Scenarios


Navigating Dangerous Situations


Imagine you are a contractor in a precarious area, carrying critical information on a micro SD card. Here’s how Undertac helps during a checkpoint encounter:


  • Avoid Detection: The E&E pocket lies flat against your body, making it less likely that non-metallic items will trigger metal detectors.

  • Survive Pat-Downs: The modal fabric minimizes bulging, reducing the chance of detection during a pat-down.

  • Quick Access: After passing through a checkpoint, quickly retrieve your tools by shifting the waistband to access the pocket.


Historical evidence shows that during WWII, SOE agents hid microfilm in shirt hems to transport intel past enemy checkpoints. Similarly, the E&E pocket in Undertac modernizes this classic tradecraft.


WWII Soldiers Behind Enemy Lines

Using Communications in an Emergency


In a crisis, you must be able to use your concealed tools effectively:


  • Micro SD Card: Insert it into a burner phone to access vital information or your crypto wallet seed phrase.

  • USB Drive: Use it with a trusted device to access important documents. Carry a small OTG adapter for convenience.

  • Note: Memorize the contact number before needing to use the note. This can expedite your response time.


The design of Undertac’s E&E pocket ensures that these vital tools are always close, not tucked away in a bag that might be seized.


Why Tradecraft Matters


Training in tradecraft isn’t only for spies; it’s for anyone who values preparedness. Whether you're in unstable areas or want to be ready for unplanned events, understanding how to conceal communications can be lifesaving. Undertac Infantry is more than just tactical underwear—it is a survival tool designed for Special Forces and available to you.


For anyone interested in more tradecraft skills, check out our post on “Escaping Illegal Restraints: Duct Tape”.


Are you interested in this topic? Do you want more tradecraft tips? Leave a comment below—we’d love to know what you’d like to see next. Stay safe, stay prepared, and support those doing good work!


What tradecraft or survival topics interest you most for future blogs?

  • Concealed Carry and Everyday Defense Tips

  • Escape & Evasion Techniques for Travelers

  • Digital Security & Cryptocurrency in Emergencies

  • Historical Spy Tactics and Modern Applications


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