100 day trial available

Primus Trail Swimrun Womens


Wear your sustainability statement with the Primus Swimrun FG, designed for endurance over land and sea. Using approximately 17 recycled plastic bottles to create a quick-draining mesh that minimises water-weight. The lightweight construction is paired with low-profile lugs for off-road traction and a neoprene ankle collar to keep out grit, ready for amphibious adventures.

1. Select Colour: Ink Blue
2. Select UK Size:
3. Optional Extras:

A selection of laces, insoles and apparel to pair with your Vivo's

This shoe fits true to size

Order before 14.30 Mon - Thurs for UK Next Day Delivery

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100 day trial for barefoot beginners

We're confident that after 100 days of au natural foot freedom (you need to give them a proper outing) your feet will love being feet. So we're happy to give you a no-quibbles test run for 100 days.

All major credit cards accepted.


The Swimrun collection was developed in collaboration with ÖtillÖ, founders of the Swimrun World Championship. Seamlessly transition between wet and dry while keeping out grit and silt -- perfect for triathalons or any extra-sloppy trail runs.

  • Foot-Shaped Construction – for unrestricted foot freedom
  • Neoprene Ankle Sock – full ankle mobility in and out of water
  • Water Repellent Recycled PET Mesh – for minimal wet weight
  • Quick Drain Zones – pump water out with each foot stride
  • Sticky Firm Ground Sole with Low-Profile Lugs – for wet/dry rock grip
  • Orange Rubber – for visibility in the water

Primus Trail Swimrun Womens DNA


Patented, ultra-thin, puncture resistant layer. 5x more puncture resistant than a standard sole of the same thickness.


Produced using animal free products and processes.

Removeable Insole
Performance Insole

3mm vegan insole. Take it out to feel the ground. Leave it in for a little extra warmth.

Breathable Mesh
Breathable Mesh

Synthetic multi-ply materials, to deliver optimum lightweight breathability and comfort.


Heat fused together for lightweight structure and stich-less durability.

Eco Rubber
Eco Rubber

A no-sew material, made from recycled tyres, with high abrasion resistance where you need it most.

Recycled PET
Recycled PET


Mostly comfortable, but doesn't feel barefoot

The shoes are generally comfortable, but there is one big problem - the little lip on the back of the heel is high enough that it rubs against the very bottom of my calf when I bend my ankle, and it produced a bleeding and painful blister in just a few hundred metres of walking the first time I tried them on. Will have to see if I can get rid of this by breaking the shoes in, or I will be unable to use them.

The soles are pretty thick, and apart from the lack of cushioning, they don't feel anywhere near as barefoot as my previous terrain shoes from Vibram Fivefingers, but since they don't have separate toes, they're slightly more comfortable, and look much more like normal shoes.

The snug fit around the ankle makes sure you don't get grit and gunk in your shoes, and feels comfortable (but makes them a little difficult to put on).

Note that the sizes run pretty large compared to EU sizes, size 3 is supposed to correspond to a size 35, but the 22.8 cm listed in the sizing chart is a pretty big size 35. I'm usually between 35 and 36 in EU sizes, these fit my larger foot quite well (but they're still longer than I need), and on my slightly smaller foot they're a bit too big.

Best Vivos I own

I own a lot of Vivos but these are my favorites by far. Very well fitted and the material is strong and excellent quality. These are the first shoes I have run long distances in and they are perfect. Putting them on with wet feet after a swim was easy as the material offered comfort and no rubbing irritations.

A great running shoe

Having loved running in the stealth 2 vivobarefoot shoes for over a year I was keen to buy a another shoe with a bit more grip for muddy, slippery runs . My new Swimrun shoes fit the bill. They are comfortable and the toggle is great as no more laces coming undone , also they dry quickly after splashing through puddles.

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