The Primus Trail Swimrun

The Official OTILLO Swimrun Shoe

100 day trial available

Primus Trail Swimrun Womens


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 Size: US
3. Optional Extras:

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

This shoe fits true to size

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.


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 : 500.0g

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.


Great for the Gym

This was my first VIVO shoe with the sock-like neoprene. At first just walking around the house it was a little odd as the material bunched in random areas, however once in the gym I could care less about the bunching as the shoes were great for indoor cycling on the trainer, strength training, and jogging.
I am looking forward taking these to a hiking trip to Hawaii and see how they turn out.

UPDATE on previous review Nice product!

Since I've been able to run a couple of times on trails now, I'd like to update my previous review from last week.

The second time around I felt the top inner eyelet (right shoe) caused a bit of chafing to the right of my bunion.

I have the fitness shoe which doesn't have any material close to the bunion area to cause hot spots or chafing.

Suggestion if you decide to modify the shoe: keep the eyelets shorter and further back so the foot can spread out without anything to rub or crease on the foot.

Great shoes

Lightweight, roomy fit, no irritations. I love the loops attached to the shoe so I can hang them onto things. Some sand still gets in the shoe despite the sock-like fit though.

Join our mailing list

Receive exclusive updates on sales, stories & product launches

Receive exclusive updates on sales, stories & product launches