The Primus Lite 3.5 is our original training all-rounder, reimagined with a new upper to get us closer to circularity. Made for moving naturally and building natural strength during runs and wide-ranging training disciplines, it’s perfect for experienced barefoot cross-trainers and those new to barefoot performance.

The Primus Lite 3.5 is a versatile performance trainer for running, cross-training, and dynamic day-to-day living that reclaims your natural potential. It’s wide for natural stability, thin for natural feedback, and flexible for natural movement.
We’re on a mission to create a fully circular shoe – a new Vivo made from an old one, which can in turn be made into another. The Primus 3.5 is a big step forward on this journey.
With an already mechanically recyclable outsole, the challenge is making an upper from 100% polyester, which can be recycled. The new Primus Lite 3.5 upper takes us from 43% to 81% polyester, of which 94% is recycled. Why not 100%? Because some parts of the upper still need extra durability that polyester can’t yet provide. We’re working with our partners to figure out this final piece of the puzzle.

With a sensitive 2mm Primus sole and a light, flexible knit upper for full natural mobility, the Primus Lite Knit is ideal for active lifestyle wear and low-intensity workouts with controlled motions and minimal lateral movement. It thrives at weight and strength training, calisthenics, animal flow and light road running.

Made for trail running, the Primus Trail Knit FG is also excellent for fastpacking and hiking. Its low profile and versatility also makes it a popular choice of outdoor lovers wherever they tread.

A knit upper and sock bring flexibility and protection. A quick-lace system means easy adjustments. And a thin Firm Ground sole balances barefoot sensation with grip, feeling fast on varied hardpack terrain, building natural strength with every step.

The Primus Trail Knit is an evolution of the Primus Trail FG: our original, best-selling trail-running sneaker.   It features a knit upper for enhanced breathability and purer trail mobility, made with recycled materials, and a sock-like construction to keep out trail debris.

Barefoot trail-running sneakers that double as outdoor lifestyle wear

The low cut ensures full ankle mobility, aiding natural movement and strength building as you take each successive step. Sleek looking hardware and metal eyelets offer secure fastening to match the new design lines. And underfoot, a new high performance outsole means you have all you need for any landscape. This is a modern take on traditional hiking footwear, to take on literally anything.