Ultra IV Womens
Obsidian / US 4.5
Sale price
$121.00 USD
Regular price
$151.00 USD
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Ultra IV Womens
Sale price
$121.00 USD
Regular price
$151.00 USD
Free EU shipping over €80
30-day wear test
Free returns
Size guide — EU, UK, US, foot length
Stand on a sheet of paper against a wall, mark the tip of your longest toe, measure heel to mark. Measure both feet in the evening and use the larger one. Between sizes? Size up for boots, size down for slip-ons.
Women
| EU | UK | US | Foot length |
|---|---|---|---|
| 35 | 2.5 | 5 | 22.0 cm |
| 36 | 3.5 | 6 | 22.6 cm |
| 37 | 4 | 6.5 | 23.3 cm |
| 38 | 5 | 7.5 | 24.0 cm |
| 39 | 6 | 8.5 | 24.6 cm |
| 40 | 6.5 | 9 | 25.3 cm |
| 41 | 7.5 | 10 | 26.0 cm |
| 42 | 8 | 10.5 | 26.6 cm |
| 43 | 9 | 11.5 | 27.3 cm |
Men
| EU | UK | US | Foot length |
|---|---|---|---|
| 39 | 6 | 7 | 24.6 cm |
| 40 | 6.5 | 7.5 | 25.3 cm |
| 41 | 7.5 | 8.5 | 26.0 cm |
| 42 | 8 | 9 | 26.6 cm |
| 43 | 9 | 10 | 27.3 cm |
| 44 | 9.5 | 10.5 | 28.0 cm |
| 45 | 10.5 | 11.5 | 28.6 cm |
| 46 | 11 | 12 | 29.3 cm |
| 47 | 12 | 13 | 30.0 cm |
The Ultra IV is your go-to amphibious footwear for exploring where land meets water—lightweight, flexible, and built for barefoot movement in nature.
Features
- NO INSOLE — No insole, bringing you even closer to the ground for a greater barefoot experience.
- VEGAN* — *The main materials in all our Vegan* products are synthetic and aren’t derived from animals. We don’t (yet) have the transparency we need over the production of all the small components (such as adhesives and dyes) used in these products to ensure they meet vegan best practices. So, whilst we believe the shoes are vegan, we’re not yet able to guarantee it and want to be fully transparent.
- EASY TOGGLE FASTENING — Fast, easy and snug toggle.
Fit
Care
- Cleaning: Brush off mud and clean with a damp cloth.
- Drying: Dry at room tempreture. Keep out of direct sunlight and avoid putting on a radiator. End of lifeOnce you can’t repair or don't need them anymore, send us your old Vivos and we’ll make they sure they’re given a second life, or if they’re really well-loved, we'll store them until we launch our recycling solution. Send us your Vivos