The foam's temperature sensitivity is minimized through a specialized polymer blend, maintaining consistent cushioning in various climates, shoes running winter.

Primus Lite 3.5: Natural Movement, Elevated Performance

The Primus Lite 3.5 takes our original training all-rounder to the next level with a redesigned upper, bringing us closer to sustainable circularity. Engineered for natural movement, this lightweight trainer enhances foot strength and agility across running, cross-training, and multi-discipline workouts.

Whether you're an experienced barefoot athlete or new to barefoot performance, the Primus Lite 3.5 offers the freedom, flexibility, and durability needed to train stronger and move naturally.

The heel bevel is angled to encourage a smooth and guided initial contact with the ground, trail running shoes.