SF-Tech TNT Pro vs. TNT One

Choosing the Ultimate Custom Drysuit

When it comes to elite, high-performance diving, Swiss manufacturer SF-Tech sets the absolute gold standard. Renowned among cave explorers, wreck divers, and technical professionals worldwide, their suits are built to withstand the harshest environments on Earth. 

If you are looking to invest in a tailor-made drysuit, you’ve likely encountered their revolutionary TNT line. Built upon a patent-pending high-density Yamamoto neoprene-based trilaminate, the TNT material solves the age-old diving dilemma: How do you get the warmth and stretch of a neoprene suit combined with the lightweight, fast-drying versatility of a trilaminate? SF-Tech cracked the code by adding two internal layers of Titanium Alpha, making the core material feel up to two times warmer than a standard butyl rubber trilaminate.  

But when it comes down to choosing your specific model, should you go with the battle-tested SF-Tech TNT Pro or the cutting-edge SF-Tech TNT One?

As your go-to experts for drysuit maintenance and drysuit repair in Belgium, we break down the definitive differences between these two masterpieces so you can make the perfect investment. When you want to see them for yourself, we have both of them in the showroom of Scuba United. Together with all the boots/socks and other options, the only dealer that has that!

The Shared DNA: What Makes Both Suits Incredible

Before looking at the differences, it’s vital to understand what makes any SF-Tech TNT suit extraordinary. Both the Pro and the One feature:

• Yamamoto High-Density Neoprene Core: Highly compressed 0.5mm neoprene layer for minimal buoyancy shift at depth and supreme thermal reflection.  

• Titanium Alpha Technology: Two built-in thermal reflective layers that trap your body heat.  

• Heavy-Duty Construction: Felled seams with double topstitching, sealed on the inside with 3 to 5 layers of manual urethane (Aquasure) sealant.  

• Telescopic Torso & Fitted Cut: Complete freedom of movement for effortless frog-kicking, valve drills, and sidemount maneuvering.  

• Fully Customizable: Tailor-made sizing with choices of Apeks or Si Tech valves, YKK Proseal metal or Aquaseal plastic zippers, colour of stitching ,and interchangeable seal systems.  

  
  

SF-Tech TNT Pro: The Armor-Plated Workhorse

The SF-Tech TNT Pro is built with a singular focus: absolute, uncompromising robustness.

The Material Structure

The external layer of the TNT Pro is constructed entirely out of a heavy-duty fabric blend consisting of 25% DuPont™ Kevlar® and 75% Nylon. Rather than just applying Kevlar patches to high-wear spots, the entire skin of the suit benefits from this aramid-fiber reinforcement.  

Best Suited For:

The TNT Pro is the ultimate choice for divers who treat their gear as a tool for survival in highly abrasive environments. If you are a commercial diver, a tight-squeeze cave explorer, a wreck penetration enthusiast, or an ice diver crawling over jagged edges, this suit is practically a suit of armor.

With the Pro version, you never have to worry about a sharp metal edge or a rough limestone ceiling puncturing your suit. It is heavier in hand, but it offers a lifetime of security against punctures.

SF-Tech TNT One: The World's First 4-Way Stretch Trilaminate

If the TNT Pro is a suit of heavy armor, the SF-Tech TNT One is an agile tactical suit.

The Material Structure

The headline feature of the TNT One is its revolutionary external fabric. Instead of full Kevlar, the primary body is made from UHMWPE (Ultra-High Molecular Weight Polyethylene) fabric.  

UHMWPE is an incredible material—structurally as strong as, or even stronger than, aramid fabrics, but with one massive advantage: it stretches. This makes the TNT One the world’s first true 4-way stretch trilaminate drysuit.

Where is the Kevlar?

SF-Tech didn’t completely abandon Kevlar on the One. They strategically placed DuPont™ Kevlar® on the highest-friction zones, including the:

• Knee pads

• Side panels and belt line

• Zipper protection flap

Best Suited For:

The TNT One prioritizes maximum lightness and unparalleled freedom of movement. Because the UHMWPE fabric is elastic, the suit moves flawlessly with your body. It is the perfect match for demanding technical and recreational divers who prioritize agility, long swims, or travel weight, but still want an incredibly robust suit that won't easily fail.  

Side-by-Side Comparison: TNT Pro vs. TNT One

Feature	SF-Tech TNT Pro	SF-Tech TNT One
Primary Outer Fabric	25% DuPont™ Kevlar® / 75% Nylon	Elastic UHMWPE (Ultra-High Molecular Weight Polyethylene)
Kevlar Coverage	Full-body coverage	Strategic zones (Knees, side panels, belt, zip cover)
Flexibility	High (Excellent for a heavy-duty suit)	Extreme (4-way stretch fabric)
Primary Attribute	Maximum abrasion & puncture resistance	Lightweight agility & unmatched movement
Weight	Approx. 4.0 kg (Depending on size/options)	Approx. 4.0 kg (Slightly lighter feel due to fabric stretch)
Ideal Environment	Advanced Cave, Wreck, Commercial, Ice	Technical, Sidemount, Warm/Cold Ocean, Exploration

The Verdict: Which One Should You Buy?

Choosing between these two legendary suits comes down to your personal diving environment and style:

• Choose the SF-Tech TNT Pro if you are frequently squeezing into tight, abusive spaces—like restricted cave passages or jagged shipwrecks—where gear longevity under extreme physical friction is your number one priority. It’s an investment for life that refuses to break down.

• Choose the SF-Tech TNT One if you want the absolute highest level of comfort, mobility, and elasticity without sacrificing premium technical strength. Sidemount divers especially favor the TNT One for the effortless way the fabric stretches during complex body contortions.

Protecting Your Investment with Scuba Repair Belgium

No matter which SF-Tech model you choose, a tailor-made suit of this caliber deserves world-class maintenance. Over years of intensive diving, neck and wrist seals will naturally degrade, zippers require lubrication, and accidental punctures can happen to even the toughest fabrics.

At Scuba Repair Belgium, we specialize in professional, factory-grade drysuit service. Whether you need a leak test, a latex-to-silicone seal upgrade (like the Si-Tech Quick Neck), a zipper replacement, or specialized urethane patchwork, we treat your gear with the same precision Swiss craftsmanship it was built with.

Have questions about custom drysuit fitting, options, or keeping your current suit perfectly watertight? Contact the Scuba Repair Belgium team today!