100 day trial available

Primus Trail Swimrun Mens


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: Black/Orange
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

Select size to show stock
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

Weight : 340g

Primus Trail Swimrun Mens 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


What can I say...I love these shoes

These are amazing. Please make safety shoes with barefoot technology, in Oxblood colour, and I will throw away all my DM’s and pledge allegiance to Vivobarefoot on bended knee.

Practically my feet feel stronger, my calves are strengthening and I’m looking forward to running again.

I have very narrow feet, so these shoes are slightly wider than I would like, but it’s not an issue. Better instructions would be welcome, as I wasn’t aware that the bungee laces can only be cut out rather than changed out, but that’s not a huge issue.

Ultimately it is the feel and comfort of these shoes that ensure I pull them on I’m the morning before thinking of any other footwear. These are a game changer.

PS perhaps update your online form so I can have my name with its hyphen!

Primus Swimrun

Great fit, found them very comfy. I was worried they would rub on the heel but I’ve had no such problems. Been careful to “break” my feet into them slowly so haven’t been running on concrete yet, mainly grass and the beach.

10/10 would highly recommend these beauties


Great shoe, well made. Rubbing slightly on my arch but think this is because I’m soft and I’ll toughen up.

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