The Primus Flow Knit combines natural barefoot performance with adaptive comfort. A seamless 360° knit upper creates a breathable, lightweight, sock-like fit that flexes with your foot, while an unstructured heel window supports natural alignment. Textured laces and engineered lace loops deliver secure lockdown without restricting movement.
Product information
Primus Flow Outsole
Reconnect and run slow
Vivos are designed with thin soles to help reconnect you with the ground, and provide flexibility for strong, healthy feet.
0.6mm
Tread depth refers to the thickness of the patterns or “lugs,” on the sole. These are purposefully designed to cater to specific surfaces and conditions, providing an ideal combination of traction, grip, and a sense of connection with the ground.
The new Primus Flow outsole is super lightweight, 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.
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.
No Insole
No insole, bringing you even closer to the ground for a greater barefoot experience.
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 an individual shoe (Mens Size 7)
WEIGHT
Based on a single shoe in Women’s size: EU 38 | UK 5 | US 7
127.7g
Materials & transparency
UPPER
Upper knit: 68% RPET, 7% Roica, 25% hotmelt. Upper TPU overlay: 60% Recycled TPU, 20% TPU, 20% Resin
LINING
Mesh: 100% RPET, Microfiber: 80% Recycled Polyester, 20% Polyurethane
FASTENING
Laces, 100% rPET
OUTSOLE
100% TPU, Midsole: 100% EPTU
MADE IN VIETNAM
Care instructions
Cleaning
Brush off mud and clean with a dry cloth.
Drying
Dry at room temperature. Keep out of direct sunlight and avoid intense heat source.




















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