Icebug

Jarv RB9X Trail Running Shoe - Men's

What Our Gearhead® Experts Are Saying:

"I tested the Järv RB9X on long, mixed-terrain days, and the combo of cushioning and grip really stands out. The upper feels secure without squeezing the toes, and the midsole stays lively even after hours on the trail."

We take the Icebug Järv RB9X Trail Running Shoe out when the route stretches far beyond the trailhead and the terrain promises a challenge. Built with input from dedicated trail runners, the shoe balances comfort and control for long distances, offering a fully cushioned platform that keeps us moving steadily over packed singletrack, rocky transitions, and wet forest paths. The woven engineered upper feels supportive yet flexible, with a roomy toebox that holds up mile after mile without pinching or hot spots.

Beneath us, the RB9X rubber outsole and aggressive tread help maintain traction on roots, dirt, and off-camber surfaces that don’t require studs. Icebug builds the midsole with a high percentage of Susterra bio-based material, creating dependable energy return with less reliance on virgin oil. It’s a shoe designed for experienced ultrarunners and new trail explorers alike—comfortable, capable, and built with a materials story that aligns with Icebug’s sustainability goals.