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 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
2. Select UK Size:

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 OÃàtillOÃà, 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

Breathable Mesh
Breathable Mesh

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

Firm Ground Sticky Rubber Outsole
Firm Ground Sticky Rubber Outsole

High abrasion, rubber outsole with low-profile, multi- directional lugs, for great traction and durability on moderately wet ground and dry, rocky surfaces.


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

Recycled PET
Recycled PET

Recycle PET. Repurposing plastic waste by giving it a second life in our shoes and keeping it from entering landfill and our oceans.


Produced using animal free products and processes.



They hug my mid foot giving me a true barefoot experience. I never slide in them!! The color selection of these are fantastic. They are remarkably durable, the most durable running shoes I’ve ever owned and I’ve been a full time personal trainer, part time athlete, for 10 years. I couldn’t say enough good things. YOU WILL NOT REGRET THIS PURCHASE!!!

Great all-round casual active shoe

Overall a brilliant shoe, comfy and very multipurpose. These are my upgrade from the Ultra Bloom III's and they feel like they won't let silt in so easily.

-The neoprene at the top is VERY tight. It's a mission to get these shoes on, but once they on they are on!

-I am a size 7 and as these were out of stock, I purchased a size 8. It was good I did, as they are still a bit snug around the widest part of my foot.

-Where the big joint of the big toe (ball of the foot) is, on the side, it looks like the fabric could easily come away from the rubber sole as it flexes so easily and permanently. It hasn't happened to my shoes but I'm keeping a close eye on it.

Overall, they've impressed me so far. I'm planning on using these as my only shoes for a 3-month backpacking trip to SE Asia and I'm confident they'll do me proud.

Brilliant shoe

I ordered these shoes for an Otillo swimrun race and I can't stop wearing them everywhere. I have slightly wider feet so this shoe is perfect for me. I ordered size 4 (37) and thought it might be too small since I usually wear a 38, but they turned out to be perfect. I love how they feel both with or without socks. My heel blisters easily so I got blisters higher up on my heel after hiking for a couple of hours - but I experience that with every new shoe.

Looking forward to ordering more!

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