The Primus Flow is the newest member of the Primus family, designed for pinnacle barefoot running performance. Built for efficient and unrestricted natural movement, this ultra-lightweight runner – our lightest ever – weighs in at just 150g. Its lightweight, breathable upper made from engineered recycled mesh forgoes overlays in favour of a stripped-back, seamless construction.

Mindfulness in motion

Embrace mindful running and full-body connection

Product Info

 

PRIMUS FLOW OUTSOLE

Embrace your human nature

NO INSOLE

No insole, bringing you even closer to the ground for the full barefoot experience.

BREATHABLE MESH

Breathable, lightweight and comfortable.

VEGAN*

*The main materials in all our Vegan* products are synthetic and aren’t derived from animals. We don’t (yet) have the transparency we need over the production of all the small components (such as adhesives and dyes) used in these products to ensure they meet vegan best practices. So, whilst we believe the shoes are vegan, we’re not yet able to guarantee it and want to be fully transparent.

WEIGHT

Based on a single shoe in Men's size: EU 42 | UK 8 | US 9

159g

MATERIALS & TRANSPARENCY

UPPER

100% recycled polyester jacquard

LINING

Unlined

LACES

100% recycled polyester

OUTSOLE

Midsole: ETPU (4mm), Outsole: 100% TPU (2mm)

MADE IN VIETNAM

Care

Cleaning

Brush off mud and clean with a damp cloth.

Drying

Remove insole and dry at room temperature. Keep out of direct sunlight and avoid putting on a radiator.

End of life

 

Once you can’t repair or don't need them anymore, send us your old Vivos and we’ll make they sure they’re given a second life, or if they’re really well-loved, we'll store them until we launch our recycling solution.

Run the way nature intended

Engineered to connect you with the ground and engage every muscle

The Primus Flow features an innovative 4mm midsole made entirely from low-density ETPU that’s designed to reduce the risk of injury without sacrificing proprioception. However, remember that barefoot running is a journey, not a race. To prevent injury, take it slow – learn how to stand, walk and squat barefoot first before attempting to run.

Fit, Feel, Flex

For natural stability, natural sensory feedback and natural strength.

PRIMUS FLOW OUTSOLE

The new Primus Flow outsole is a super lightweight 150g, crafted for speed and agility on runs. It delivers flexibility and grip, empowering stronger feet through a purposeful design that keeps you connected to the ground for more mindful running.

Sole base

1.4mm

Tread Depth

0.6mm

The ultimate barefoot experience.

Shoes that put fashion before fitness and money before wellness? The unnatural isn't working. It's time to get back to basics and let nature heal us.