INOV-8 TRAILFLY ULTRA G 280: NITROGEN INFUSED MIDSOLE FOR MORE BOUNCE. Our TRAIL RUNNING SHOES  section continues with the 2022 novelties and today bring us the review analysis of these brand new inov8 TRAILFLY ULTRA G 280.

The new shoes will be officially launched on Thursday (October 13th) with a price of 190€, a weight of 280 grams for a drop of 8 mm.

190€ | 280G. | 8MM DROP

inov-8 is launching its first-ever trail running shoes to include the use of nitrogen gas.The pioneering sports brand say their new nitrogen-infused midsole foam will give runners more underfoot bounce.

Testers of the TRAILFLY ULTRA G 280 have reported that the shoes made them feel like they were flying… almost cheating!


  • Price:£165 | $185 | €190
  • Weight: 280g per shoe
  • Stack height (including outsole and footbed): 33mm/25mm
  • Drop: 8mm
  • Width (on inov-8 1-5 scale, with 5 being the widest): 5
  • Lug depth: 4mm
  • Colours: Men Pine & Nectar | Grey & Blue. Women Red & Burgundy
  • Use: Trail running and ultramarathon running
  • Terrain designed for: Hard-packed trails


Prepare to run lighter, with a softer ride,greater bounce,and more underfoot trail control.The new TRAILFLY ULTRA G 280 is coming in October to give trail runners the ultimate in long-distance performance. Boasting a new nitrogen-infused midsole foam that is light and sustainable, you’ll feel connected to the trail like never before in running shoes that flex and spring while cushioning your every step.

Wayne Edy, founder of inov-8, said: “The nitrogen foam we’ve created gives an amazingly lighter, softer ride for those runners looking for that. Given what our testers said about it,we decided to call the foam FLYSPEED.“It debuts on our new TRAILFLY ULTRA G 280 shoes, which we can’t wait to get on the feet of trail and ultramarathon runners.It has great levels cushioning while at the same time delivering incredible bounce and a feeling of being connected to the trail.”

To prove the trampoline-feel bounce effect, inov-8 carried out further testing which showed that FLYSPEED foam gives back 65%-68% of the energy put in.

A standard foam midsole gives back 45%-48%.The new shoes also boast rubber enhanced by Graphene–which is 200 times stronger than steel–for the world’s toughest grip and a clever underfoot flexing technology that allows runners to feel more connected to the trail.

The TRAILFLY ULTRA G 280 have already been worn by inov-8 athletes competing in–and in some cases winning–races ranging from 5km to 350km.

One of those, top Spanish trail runner Abel Carretero, said: “The comfort is extremely good for long distances and the bounce is so great you feel like you’re flying. It feels a bit like cheating!”Next year sees inov-8 celebrate 20 years, with many more footwear, clothing and equipment innovations planned for runners, as well as hikers and gym-goers.

A breathable, stretchy knit material upper, combined with a padded tongue, provide enhanced comfort without compromising on durability.

The fit has been designed to support and adjust to the natural swelling of the foot when running long distances.

Features our widest toe box, allowing extra wiggle room and comfort for toes, which are also protected by a front bumper.

New nitrogen-infused FLYSPEED midsole foam cushioning delivers our softest-ever ride, combined with incredible bounce and energy return. Ultralight and durable, the foam is our first to feature the use of nitrogen gas, reducing the amount of energy and chemicals used in the manufacturing processes.

Testing shows that FLYSPEED foam gives back 65%-68% of the energy put in. A standard foam midsole gives back 45%-48%.

Overall stack heights of 33mm in the heel and 25mm in the forefoot, combined with an 8mm drop, help deliver lots of underfoot comfort for running longer distances.

An 8mm deep ADAPTER-FLEX groove helps the shoe adapt, flex and mould to uneven terrain for a connected trail ride. It helps free the midsole of rigidity and works in tandem with the foot’s midtarsal joint to increase mobility.

Graphene-enhanced rubber delivers the world’s toughest grip – insane sticky traction AND increased durability, no compromise. 50% stronger, 50% more elastic, 50% harder wearing, scientifically proven.

Multi-directional 4mm deep lugs on each shoe have been meticulously shaped and positioned to improve both propulsion at the front and braking at the rear. Measured spacing between the lugs prevents debris from sticking to the outsole, while water dispersion channels and rubber dimples give extra grip on slick surfaces.

Vertical grooves cut into the rubber allow the foot’s metatarsal bones to move more independently, aiding adaptability and flexible grip when running over uneven terrain.