Are these shoes cause pain or any problem to backbone and knees?

No these trainers are designed to help with knee and back pain, by allowing the foot to be in its natuaral position. They take a bit of getting used to, but feel brilliant on my feet. Hope this helps

i wear 7.5 what size should i get 7 or 8?

People say they run large but I am a size 11 and they fit true to size for me. Depends if you have wide/narrow feet - if you have wider feet go for the 8, narrow go for the 7. Hope that helps

Vivobarefoot Primus Lite Iii Mens Barefoot Trainers Build Strength Balance

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

🦶 Step into strength, style, and sustainability — your feet’s new best friend.

LIGHT AS AIR - At just 232g (men's size 8), these trainers redefine lightweight performance for all-day training and running.
FEEL EVERY STEP - Experience unmatched ground connection with a minimal 2mm Primus outsole that sharpens your natural foot agility.
ECO CONSCIOUS COMFORT - Active Ortholite insole crafted from 98% recycled materials delivers sustainable cushioning and superior grip.
BUILT TO LAST PROTECT - Pro5 puncture-resistant layer ensures safety without sacrificing barefoot sensory feedback.
WIDE FIT NATURAL SPREAD - Generous toe box promotes healthy foot alignment and stability, perfect for strengthening your foot muscles.

The VIVOBAREFOOT Primus Lite III Men's Barefoot Trainers combine ultra-lightweight design (232g), a minimal 2mm outsole for natural foot movement, and a puncture-resistant Pro5 layer for protection. Featuring a wide toe box for healthy foot spread and an eco-friendly insole made from 98% recycled PU foam, these vegan trainers are engineered for versatile training, running, and everyday wear, enhancing balance, mobility, and foot strength while keeping you grounded.

Specifications

ASIN	B09C5P3GW1
Best Sellers Rank	320,016 in Fashion ( See Top 100 in Fashion ) 625 in Men's Road Running Shoes
Brand	VIVOBAREFOOT
Care instructions	Machine Wash
Closure Type	Lace-Up
Colour	Bright White
Cushioning Level	Minimal
Customer Reviews	4.3 out of 5 stars 666 Reviews
Fit to Size Sentiment	Positive
Has Shoe Adjustability	No
Heel Type	Flat
Insole Cushioning	Minimal
Insole Material	Polyurethane Foam
Item Weight	1000 Grams
Lace Closure	Laces
Lace Ends	[Plastic]
Manufacturer	Vivobarefoot
Manufacturer part number	309092-0643
Material composition	Breathable Eco Mesh made from recycled PET bottles, with lamination.
Model Name	Primus Lite Iii
Model number	309092
Number of Items	1
Occasion Lifestyle	athletic
Occasion Type	athletic
Outer Material Type	Recycled PET
Outer material	Recycled PET
Pattern	Solid
Season	SS2022
Shoe Height Map	Low Top
Shoe Type	Athletic Shoe
Sole Material	Rubber
Sole material	Rubber
Special Feature	hard-ground
Specific Uses For Product	Sports
Sport Type	Cross-Training
Stitching Style	Edge stitch
Strap Type	Laces
Style Name	Low-Top Trainers
Theme	Sport
Toe Style	Open Toe
Water Resistance Level	Not Water Resistant
lining-description	Unlined, airy air mesh
material-type	Textile

Reviews

A**S

22.11.2025

G**N

7.03.2025

T**R

15.02.2023

A**N

13.10.2025

R**U

22.03.2025

S**T

1.08.2025

A**R

3.04.2025

F**I

25.04.2025

P**R

9.05.2024

F**A

22.12.2024

U**L

28.11.2024

R**S

1.05.2024

2**0

12.04.2026

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VIVOBAREFOOT Primus Lite III Mens Barefoot Trainers | Build Strength, Balance & Mobility | Lightweight for Training & Running | Wide Fit Grounding Shoes | Vegan |

Description

Specifications

Reviews

Common Questions