Why an air-cushion case out-performs rigid armor when a phone falls from the stratosphere — or from your pocket.
Military-grade was the old bar. Space-Grade is the new one.
On 24 June 2026 in Kiruna, Sweden, an AirX Ultra-Cushioned Phone Case protecting an iPhone 17 Pro free-fell 30,607 meters from a high-altitude balloon over the Arctic and hit the ground still fully functional — a GUINNESS WORLD RECORDS™ title for the Highest Drop of a Mobile Phone in a Phone Case (Natural Landforms).
That result didn't come from a thicker shell or a lucky landing. It came out of RHINOSHIELD's Impact Lab, which originated in Cambridge, England, and set out to prove a standard stricter than "military-grade" — something the lab calls Space-Grade: internal impact prevention capable of surviving near-space conditions, not just surface scratches. Here's what's actually inside the case that made that possible.
Air as the engineering material, not a metaphor for lightness
AirX's protection doesn't come from piling on extra plastic. It comes from RHINOSHIELD's proprietary Double-Layered Defense and exclusive ShockSpread™ material technology — a dual-layer matrix built around sealed internal air isolation chambers that act like a full-body airbag wrapped around the phone.
On impact, the enclosed air and the surrounding compression skeleton compress and redistribute kinetic energy across the whole shell in milliseconds, flattening the deceleration spike before it reaches the phone's frame, camera module, or optical image stabilization (OIS) system. It's the same physics behind automotive airbags and cushioned performance footwear, engineered down to millimeters: extend the time and area over which a force is absorbed, and you reduce the peak force that actually reaches what you're protecting.
That structure shows up in the numbers. In RHINOSHIELD's own in-house G-force drop testing, AirX has consistently recorded the lowest G-force at the phone's corners — its most structurally vulnerable points — of any case the lab has tested, including thicker, multi-material rivals. It's also why the case is built to catch a category of damage most people don't think to look for. A case surviving a drop isn't only about whether the screen cracks; a hard enough jolt can disrupt OIS calibration or antenna performance without leaving a single visible mark. AirX's internal-first design targets both the damage you can see and the damage you can't.
Built to bend, not break
A sealed air chamber solves for one kind of impact — a flat, distributed hit. A stratospheric free-fall raises a second material problem a countertop drop never will: what happens when the case meets a sharp rock edge or a hard corner at speed, rather than a flat surface.
Rigid, multi-material armor cases typically handle blunt-force impact by stacking harder plastics and raised bumpers — a structure that holds up well against a flat, distributed hit, but that concentrates all of a sharp impact's force onto a single tiny contact point. That's exactly the condition under which hard plastics tend to crack or shatter rather than absorb: small contact area, huge instantaneous pressure, nowhere for the energy to go but through the material.
AirX's outer layer is engineered for that failure mode specifically. It's built with a high elongation-at-break rating — able to stretch to roughly 600% of its original length before it would ever tear — so on contact with a sharp edge, the material doesn't split; it flexes and wraps around the point of impact, spreading a small, concentrated force across a much larger surface area and converting the fall's energy into material strain instead of a fracture. It's the material difference between blocking a hit and catching it.
Paired with the internal air-chamber cushioning, the case handles impact in two stages: the outer layer neutralizes sharp, localized contact, while the internal structure disperses the broader shock of the fall itself. Together, that's the Double-Layered Defense — a high-elongation outer layer plus an internal air-cushion matrix — that let a phone hit the ground at terminal velocity, at temperatures well below freezing, on unpredictable Arctic terrain, without a mark on it.
Why the cold matters as much as the fall
Temperature is a material problem the record exposed almost as much as the altitude was. The drop payloads endured temperatures as low as -60°C (-76°F) on the way down — cold enough to make most consumer electronics, and most polymers, give up long before impact. Extreme cold stiffens a plastic's molecular structure and makes it more brittle, which is exactly the condition under which a case is most likely to crack instead of cushion. AirX's material had to hold onto its flexibility through that temperature swing before it ever faced the fall itself — a stress test no kitchen-counter drop video can replicate.
One material, not a stack of them
Every part of this — the air chambers, the compression skeleton, the high-elongation outer layer — comes from a single mono-material build, not the mixed-material construction typical of rigid armor cases. That's a deliberate constraint, not a shortcut: RHINOSHIELD has argued since 2017 that sustainable design shouldn't mean compromised protection, and building AirX's dual defense out of one material rather than several is what keeps the whole case recyclable at the end of its life instead of a mix of parts that has to be separated by hand.
Because it's mono-material, AirX is 100% recyclable through RHINOLOOP®, RHINOSHIELD's mail-in recycling program — available via mail-in returns across the UK, France, Germany, and the US.
The proof points, in one place
Space-Grade standard — internal impact prevention built to survive near-space conditions, not just surface scratches
Lowest corner G-force in RHINOSHIELD's in-house testing across all cases evaluated, including thicker, multi-material rivals
400% elongation-at-break outer layer — flexes and wraps around sharp impacts instead of cracking
Protects external and internal damage — screen and shell, plus OIS calibration and antenna performance
2026 iF Design Award and Red Dot Design Award winner
GUINNESS WORLD RECORDS™ title: Highest Drop of a Mobile Phone in a Phone Case (Natural Landforms) — 30,607 meters
Built for impact. Carried like air.
Learn more at rhinoshield.io