Primus Flow Womens
Welcoming the latest addition to our Primus performance lineup, the Primus Flow - designed for speed, agility and to awaken total awareness to your human potential with an amazing barefoot running feel. At just 150g in weight and with 5.6mm of underfoot material, this is a trainer that mindfully tunes you into every single movement.
Usage: Athletic, Casual, Running, Gym/Fitness, Natural Movement, Active Recovery
Welcome to the Vivobarefoot Size Guide! Vivobarefoot's shoes fit 'big' deliberately – we call this ‘the rule of thumb’. Your toes need wiggle room! This is especially important for running. If you can fit your thumb in-between the end of your toe and the front of the shoe, you’ve more than likely found your ideal size.
**After some time with these shoes, your shoe size may need to increase, as your toes splay out more naturally.**
Please note there are different size charts EU, UK and US for Womens, Mens and Toddlers, Kids and Junior sizes.
Womens Footwear Size Guide
US Womens Printable Size Guide
EU and UK Womens Printable Size Guide
| Length (cm) | EU | UK | US |
| 22.8 | 35 | 3 | 5.5 |
| 23.5 | 36 | 3.5 | 6 |
| 24.2 | 37 | 4 | 7 |
| 24.9 | 38 | 5 | 7.5 |
| 25.5 | 39 | 6 | 8 |
| 26.1 | 40 | 7 | 9 |
| 26.9 | 41 | 8 | 10 |
| 27.5 | 42 | 8.5 | 11 |
| 28.2 | 43 | 9 | 11.5 |
Mens Footwear Size Guide
EU and UK Mens Printable Size Guide
| Length (cm) | EU | UK | US |
| 26.2 | 40 | 6 | 7 |
| 26.9 | 41 | 7 | 8 |
| 27.6 | 42 | 8 | 9 |
| 28.2 | 43 | 9 | 10 |
| 28.9 | 44 | 10 | 11 |
| 29.5 | 45 | 11 | 12 |
| 30.2 | 46 | 11.5 | 12.5 |
| 30.9 | 47 | 12 | 13 |
| 31.5 | 48 | 13 | 14 |
| 32.2 | 49 | 14 | 15 |
Toddlers, Kids and Juniors Footwear Size Guide
US Toddlers, Kids and Juniors Printable Size Guide
EU and UK Toddlers, Kids and Juniors Printable Size Guide
Toddlers
| Length (cm) | EU | UK | US |
| 12.7 | 20 | 4 | 5 |
| 13.4 | 21 | 4.5 | 5.5 |
| 14.1 | 22 | 5 | 6 |
| 14.7 | 23 | 6 | 7 |
| 15.4 | 24 | 7 | 8 |
Kids
| Length (cm) | EU | UK | US |
| 16 | 25 | 8 | 9 |
| 16.7 | 26 | 8.5 | 9.5 |
| 17.4 | 27 | 9 | 10 |
| 18.1 | 28 | 10 | 11 |
| 18.7 | 29 | 11 | 11.5 |
| 19.4 | 30 | 11.5 | 12 |
| 20.1 | 31 | 12 | 13 |
| 20.7 | 32 | 13 | 1 |
Juniors
| Length (cm) | EU | UK | US |
| 21.3 | 33 | 1 | 2 |
| 22 | 34 | 2 | 3 |
| 22.8 | 35 | 3 | 4 |
| 23.5 | 36 | 3.5 | 4.5 |
| 24.2 | 37 | 4.5 | 5 |
| 24.9 | 38 | 5 | 6 |
THE SCIENCE
When wearing Vivobarefoot, which closely replicates the barefoot condition allowing feet and toes space to move freely, adult feet may grow over months and years as feet and toes splay to a more natural shape and feet strengthen.
In addition, feet do keep growing, up to 0.5 size a decade and even after 40. So please measure your feet! An extra 6-14mm toe allowance may seem excessive, but science suggests:
- Kids' feet grow between 5mm and 11mm a year between the ages of 6 and 16; we recommend 6 months growing room plus room for natural movement.
- Adults' and Teenagers' feet can grow by up to a size, 7-8mm or more, as a result of exercise and time of day. (Wider higher arched feet grow more than narrower lower arched feet)
- Some of us prefer additional space beyond 14mm to accommodate width or simply because we like a spacious fit.
- In the crossover sizes (EU40-43) men with narrower feet may prefer the women's fit and women with wider feet may prefer the mens. We experience this in store on a daily basis.
Please make sure you find your size using the appropriate size chart (men's and women's sizing is different)
FIT PREFERENCE
Whilst we recommend 6-14mm, the amount of space you have will depend on how the length of your feet compares to the sizing
The ideal fit for you will depend on how wide your feet are and/or if you prefer your footwear to fit snug or spacious.
NARROW FEET/SNUG FIT:
Our research suggests that if you measure to the top end of the 6-14mm suggested toe allowance; for example, if you have 12mm but have narrow feet and/or prefer a more snug fit, you may prefer a size down. We suggest at least 4mm toe allowance, even for the narrowest feet.
WIDE FEET/LOOSE FIT:
If you have wide feet and or prefer a spacious ‘roomier’ fit, you may prefer to have more than 14mm space at the front.
Caution: Risk of trips and falls is increased with additional length therefore we advise caution when transitioning into wearing your preferred size footwear if it is larger than you’re used to. Many Vivobarefoot customers have very wide feet and enjoy 20mm toe space without any issue, we simply advise caution if you are new to wearing a more natural fit.
OUR FOOTWEAR IS FOOT SHAPED NOT SHOE SHAPED
WHY? Vivobarefoot are wide and thin – balance and physical function improve as feet splay and feel. Vivobarefoot are super flexible - feet get stronger as feet move more, toes and arches included! It is the combination of wide, thin and flexible which leads to all the benefits.
Increasing foot strength both reduces the risk of foot deformities and injury (Garth et al., 1989, Curtis et al., 2021) and is associated with improvements in balance and stability; especially for the elderly (pink et al., 2011, Cudejko., 2020). Also, children who run barefoot jump higher with shorter contact times (Mizushima, 2020).
Vivobarefoot make footwear which gets as close to barefoot as you can, so you can balance, feel and move. We believe in footwear which regenerates feet and planet. We do not believe in band aids for feet or planet. Our footwear is supernatural foot shaped not shoe shaped.
THINK FEET FIRST.
Sale Terms and Conditions:
- Sale ends midnight Monday 1st December
- Up to 50% off selected footwear. Not all styles included.
- No retrospective discounts, no rain checks, only while stocks last, limited time only.
- No refunds for change of mind on discounted products, exchange or store credit only.
Free Australian shipping over $100
Ships from Melbourne warehouse
Fast, easy returns
Let customers speak for us
These shoes are dangerous - you WILL want to swap out all your shoes for their sexier barefoot cousins once you start this journey, so beware!
I took the recommendation of sizing up and promptly returned them, realizing this suggestion may be more appropriate for those with less barefoot mileage, aka crinkled corporate toes. I usually wear a 9.5 US and have ended up with 40 EU, the equivalent size, and I am in love.
It's early days, as I've only had these for a few weeks, so I am curious how they will hold up, as there is little to them. I will update this review in a few months ;)
Thank you for the wonderful, prompt service from Natural Shoe Store with my purchase and return. Although I would love free returns on sizing concerns (please?).
To whoever is reading this, you are made for great things. You can do this!
Ordered the Duckfeet Klitmoller slides for a 5 week overseas trip to US/Ireland/UK and I wore them every day! They are super comfortable, the wool lining doesn't get too hot, and adds a bit of extra comfort. I got loads of compliments and questions about them. The team at The Natural Shoe Store were extremely helpful when I was considering the purchase, emailing back and forth with me to ensure I had the right size and offering exchange options which would suit (considering I was going overseas in a matter of days) if I got the wrong size (thankfully that wasn't needed but it was very appreciated!).
I'll be looking for my next pair of Duckfeet next year and will definitely be purchasing from here again.
There was a minor issue with my order, but a friendly staff member promptly reached out and offered an alternative. It turned out to be a blessing in disguise! These boots are amazing – they’re not cheap, but they’re a true investment. I can’t stop wearing them! Thank you so much :)
Cannot speak highly enough of these shoes (as well as the phone support I got when calling asking about the sizing). Worth every dollar. My feet are sooo happy. I thought they’d need “breaking in”…no such thing. In fact I don't want to take them off at home!
The most comfortable boots I’ve ever purchased or worn. I have a pair of standard boots and well in line boots. Both fantastic. Great company hard wearing well mate. A great pair of shoes.
This is my 3rd pair of Faborgs. I love them due to their craftsmanship, comfort and beautiful colours! Most comfy boots EVER! 100% recommend
Really happy with the Vivo Barefoot Magna Light. The give the barefoot feel with great grip and fit around the ankles. The fit a broader foot and feel really comfortable. Love them!
I love the green colour and lilac lining. Its the perfect size, beaitifil strap and hardware and I can put glasses in a pocket so do t need a case for them and I can find them first dig!
On a recent trip to Melbourne we visited your store to get a feel for barefoot shoes and to see what all the fuss was about. We received wonderful service and got to try on a number of pairs to find the right fit and style. My partner and I were so impressed we walked away with a pair each and a good recommendation for strong coffee nearby. After that, I returned to the store to buy a second pair before heading home. Two weeks have passed and I haven't taken my barefoot/natural shoes off. My back pain has gone, as has my bunion pain. I work in events management and my feet often ache. My toes have started to straighten and find the ground in a whole new way. The sensations are returning to my feet and I cannot see myself wearing standard shoes any more. My partner and I are looking forward to expanding our collection and we can't thank you enough for your expert advice, professional service and amazing products. We highly recommend you to our family and friends now. Do yourself a favour if you're reading this review and free your toes today!!
It’s so surprising how something so minimal and thin becomes one of the most comfortable shoes I own. Really makes me realise that less is more, and natural is the way forward. I am using it for strength training and walking — it’s been about a month and it’s holding up well so far. My only wish is that they make these shoes more affordable!
Love my new Vivobarefoot shoes, they are the weatherproof edition so I can’t wait to try them in the wet weather. So comfy for every day too.
I was impressed with how quickly they were shipped out and updated along the way with tracking updates. Thank you very much very happy!
Wazza
I've been thrashing my Duckfeet for over two months now. On footpaths, roads, and hiking trails, beaches, ice and snow...and they just continue to satisfy. No matter if the temps are -19º or 17º they keep my feet so dry and warm.
These babies have been on my feet almost constantly the last few weeks. They’ve climbed mountains, clambered rocks and walked beaches. They’ve accompanied my feet to dinner and have walked all over cities and through beautiful towns. They’ve been deliciously warm in sub-zero temps (but not hot on the warmer days) and so incredibly comfortable. Would recommend and buy again in more colours.
Arhus duckfeet boots are stunning & comfortable, my second pair.
Love my boots ❤❤
I recently ordered the Duckfeet Wool Insoles for my new boots. They are so incredibly comfy and warm - they really add a bit (more) lux to already luxurious shoes!
Shipping was very fast, I placed my order in the morning and the insoles were with me by the next morning! Great customer service as always.
Features and Specifications
Shipping and Return Details
Shipping Policy
- Free Shipping Over $100: Enjoy free shipping on all orders over $100 within Australia.
- Ships from Melbourne Warehouse: All orders are processed and shipped directly from our Melbourne store for fast and reliable delivery.
- Delivery Times: Estimated delivery times are 3-7 business days for standard shipping within Australia.
For faster delivery, Express Post guaranteed delivery within the Express Post network. - Australian Shipping Costs: Standard shipping is free for orders over $100. For orders under $100, a flat rate of
$8 applies. Expedited shipping costs vary based on location and chosen service.
Return Policy
- Fast, Easy Returns: We offer hassle-free returns within 30 days of purchase. Items must be unworn and in their original packaging for full price items. Discounted items are eligible for exchange of store credit only for change of mind.
- Return Process: To initiate a return, contact our customer service team or visit our returns page for detailed instructions.
- Refunds: Refunds will be processed within 7-10 business days after we receive the returned item. Refunds will be issued to the original payment method.
- Exchanges: If you wish to exchange an item, please contact our customer service team to arrange for a return and replacement.
For more details on our shipping and returns policy, please refer to our Refund Policy and
Shipping Policy.
