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309631-06-M40

Vivobarefoot Primus Flow Knit Mens Barefoot Shoes

Size Guide
Size Guide - Vivobarefoot

Place a piece of paper larger than your foot against the wall. Ensure that the wall is flat, and if there is any skirting, it is also flat. 

Stand on the paper with your heel against the wall. Ensure that the floor is hard and that the paper does not slide under any gap between the floor and the wall/skirting.

Mark the paper where your longest toe reaches with the pencil. Remember to not tuck the pencil under the toe as you want an accurate maximum measurement.

Measure the distance from the end of the paper to the toe line with a ruler or tape measure.

Repeat with your other foot, they might be different – trust us on this one! – and then use the longest measurement.

Use our conversion tables below to work out your recommended fit.

WOMENS FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
21.2 - 22.1 35 2.5 4.5
22.2 - 22.8 36 3 5
22.9 - 23.5 37 4 6
23.6 - 24.1 38 5 7
24.2 - 24.8 39 6 8
24.9 - 25.4  40 7 9
25.5 - 26.1 41 8 10
26.2 - 26.8 42 8.5 10.5
26.9 - 27.4 43 9 11

MENS FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
24.6 - 25.5 40 6 7
25.6 - 26.2 41 7 8
26.3 - 26.9 42 8 9
27.0 - 27.5 43 9 10
27.6 - 28.2 44 10 11
28.3 - 28.9 45 11 12
29.0 - 29.6 46 11.5 12.5
29.7 - 30.3 47 12 13
30.4 - 30.9 48 13 14
31.0 - 31.6 49 14 15
31.7 - 32.3 50 15 16
32.4 - 33.0 51 16 17

TODDLERS FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
9.4 - 10.2 18 2 3
10.3 - 10.9 19 3 4
11.0 - 11.6 20 4 5
11.7 - 12.3 21 4.5 5.5
12.4 - 13.0 22 5 6
13.1 - 13.6 23 6 7
13.7 - 14.3 24 7 8

PRESCHOOL FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
14.4 - 14.9 25 8 9
15.0 - 15.6 26 8.5 9.5
15.7 - 16.3 27 9 10
16.4 - 17.0 28 10 11
17.1 - 17.6 29 11 11.5

KIDS FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
17.7 - 18.3 30 11.5 12
18.4 - 19.0 31 12 13
19.1 - 19.6 32 13 1
19.7 - 20.2 33 1 2
20.3 - 20.9 34 2 3

JUNIOR FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
21.0 - 21.7 35 3 4
21.8 - 22.4 36 3.5 4.5
22.5 - 23.1 37 4.5 5.5
23.2 - 23.8 38 5 6
23.9 - 24.4 39 6 7

RECOMMENDED

SNUG

 

This shows how a shoe would fit snug. It’s still a correct fit, but with less space around and at the front of the toebox. 

RECOMMENDED

 

This is the shape of the recommended fit of Vivos. Remember, it might not be your preferred fit.

SPACIOUS

 

If you prefer a roomier fit or think you have wider-than-average feet, you might consider going a size up.

Colour: Skyway
Skyway
Eclipse
Apricot
Size: US 7 EU 40

1 item left

Vivobarefoot Primus Flow Knit Mens Barefoot Shoes Skyway US 7 EU 40

Skyway / US 7 EU 40

2026-07-16 2026-07-23

details

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.

Primus Flow Outsole

Reconnect and run slow


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

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


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.

Lightweight freedom. Adaptive comfort.

Engineered to connect you with the ground and engage every muscle

Set on our ultra-light Primus Flow sole, the Primus Flow Knit keeps you close to the ground for pure sensory connection. From focused runs to everyday flow, connect to your body and move in the moment. But remember, barefoot running is a journey, not a race. To prevent injury, take it slow by first learning how to stand, walk and squat barefoot before attempting to run.

Urban

Stripped-back soles for barefoot living — so you're never too far from nature, even in the city.

Fit, Feel, Flex

For natural stability, natural sensory feedback and natural strength.

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