100 day trial available

Primus Trail Swimrun Mens


The OTILLO Primus Trail Swimrun is designed for endurance over land and sea, with a lightweight construction and sock-like ankle fit. It has a quick-draining mesh for minimal water weight and low-profile lugs for off road traction.

1. Select Colour: Black/Orange
2. Select US Size:
3. Optional Extras:

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

This shoe fits true to size

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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 : 600g

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.


What the Doctor Ordered

I love this shoe. I have suffered from Planter's fasciitis in my left foot and this shoe has provided me the support and flexibility that has returned the pleasure to my 4 mile hikes. Also, it is versatile. Sheds water, dries quickly, and is sturdy on the trail. Excellent in all aspects.

Love them!

I love these shoes! They are so comfortable and don't impinge my feet at all while I exercise or move around. The opening where you insert your foot is too tight for my very high-arched feet making it difficult for me to get them on quickly. Maybe it'll stretch out over time. Once on, the shoes are perfect! I won't ever go back to regular running shoes.

I just ran my first 5k in these

I just ran my first 5k (actually, this was 3.5 miles, but close enough) in these. I know this isn't meant to be a road shoe, but I wanted something versatile enough that I could use it for other purposes so they wouldn't just sit in my closet afterward.

I'd say that the faster you're going, the more comfortable these shoes are. There's just something about them that makes you want to push with your feet. They fit snugger than my other vivos*, and aren't as comfortable for casual use, but for running they were phenomenal. I broke into a full sprint at the end, and they felt great.

* I find that vivobarefoot shoes generally fit a bit loose. I'd say these fit a bit snug compared to other vivobarefoots, but not compared to other shoes generally.

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