Our Materials and Testing
At Tech21, we don’t just make phone cases—we engineer them. Our materials are designed for ultimate protection, and every case undergoes rigorous testing to ensure it meets the highest standards for impact resistance, durability, and long-term performance.
What makes our cases different?


Flexshock
FlexShock is our high-performance material that absorbs and disperses impact energy, shielding your device from drops and knocks without adding unnecessary bulk.
Bio-Spice
Our commitment to the planet starts with Bio-Spice—a cutting-edge material made with recycled and biodegradable elements, ensuring sustainability without sacrificing strength.


How we test our cases


Impact Testing: Built to Take a Hit
Every Tech21 case is tested using our custom-built impact drop tower—developed in collaboration with the UK’s National Physical Laboratory (NPL). This unique machine allows us to measure exactly how well our cases absorb shock using highly sensitive sensors.
We don’t just drop test—we analyse. By tracking energy transfer and impact efficiency, we ensure your device stays protected even in the toughest falls.


Weathering Testing: Ready for Any Environment
From scorching heat to freezing cold, our cases are built to withstand extreme conditions. We use two specialized machines:
Environmental Test Chamber: Simulates extreme temperatures (-50°C to 400°C) and humidity levels to test how our cases handle real-world shipping and climate changes.
Accelerated Weathering Tester: Mimics two years of sun, rain, and condensation in just two weeks—ensuring our cases don’t yellow, crack, or degrade over time.


Scratch Resistance: Staying Smooth and Strong
Everyday wear and tear shouldn’t mean a scratched-up case. That’s why we put our materials through three scratch tests:
Pencil Hardness Test: Measures coating durability using graded pencils.
Mohs Hardness Test: Ranks scratch resistance on a scale from talc (softest) to diamond (hardest).
Taber Abrasion Test: Simulates years of friction using rotating abrasive wheels, ensuring your case stays sleek.


Military Standard Testing: Top-Grade Protection
We push our materials to the limit with rigorous military-grade testing, ensuring durability and protection beyond industry standards.
MIL-SPEC signifies that something meets a certain Military Standard Specification. It guarantees a level of durability for a piece of technology. Specifically, it means the equipment has gone through a series of 29 tests. These put the case up against shock, vibration, heat, cold, humidity and more to ensure that your devices are protected by the best products around.
Shop Our Products
Discover our full range of durable, sustainable cases designed to keep your device safe for years to come.