The Official OTILLO Swimrun Shoe

100 day trial available

Primus Trail Swimrun Mens


The Primus Trail Swimrun is designed for endurance over land and sea. Primus Swimrun has minimalist lightweight construction and features a neoprene sock-like ankle fit to keep out grit. Quick-draining mesh minimizes water weight and low-profile lugs offer off road traction. A critical part of any wet-dry workout: Primus Swimrun lets you transition seamlessly between water and dry land. It is prefect shoe for all your 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

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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.

Designed for people with amphibious tendencies, this shoe is built to go the distances over land and sea.

  • Foot-shaped construction – for unrestricted foot freedom.
  • Sock-like neoprene ankle fit - to help keep little nasties out of you shoe and give full ankle mobility in and out of the water.
  • Water repellent mesh – for minimal wet weight.
  • Quick drain zones – to help pump the water out with each foot stride when you hit dry land.
  • Sticky orange rubber FG sole with low-profile lugs – for wet/dry rock grip and partner visibility when you're on the swim section.

Vivobarefoot has designed this shoe in collaboration with the original swimrun world championship partners at Ötillö Swimrun.

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.


Another great shoe

I bought these for non-trail running (I have the Primus Trail SG for trail runs). I use them as a general trainer and for road running.

The fit is great. They are very comfortable to wear and train/road run in.

As with the Primus Trail SG my only problem is getting them on my high instep - but a small shoe horn and a little practice and this is no longer a problem.

I use the insole supplied and also the quick adjust laces rather than the conventional laces.

Perfect for my needs

First -time buyer, and very happy that I have. It's not often that you find a shoe that fits well and feels good. Bought these specifically for a trip to Bali (in 4 weeks time), but needed the time to get used to a different feel.
As I walk barefoot whenever possible, and have owned some 'barefoot' (not Vivo) running shoes in the past, it has not been too much of a transition. These are specifically for a purpose; running, walking, hiking, swimming; and, so far, I've only walked; but I find them very comfortable and enjoy the sensation of actually feeling the ground with my feet and toes.

So far so good

I found the shoes super comfortable with the extra soles. I've been using them on a daily basis to get use to the shape before running with them. I will fully know how good they are during my first Swimrun June 2018.

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