We’re thrilled to announce the launch of our first barefoot sneaker: iON SYNC® Tolos Shoes.

We've equipped Tolos barefoot shoes with our groundbreaking iON SYNC® Earthing Plugs to offer a shoe designed for biohackers, nature lovers, and rewilding enthusiasts alike.

Our iON SYNC® Earthing Plugs have been years in the making—a highly durable and conductive innovation that replicates the barefoot experience like never before. Integrated seamlessly into the soles of TOLOS, they provide an unmatched grounding experience to help balance your body’s natural energy.

Available in black/tan, black/black, and white/white, iON SYNC® Tolos Shoes combine minimalist style with advanced grounding technology to keep you connected to the Earth with every step.

iON SYNC® is Patented Technology

Specs

iON SYNC Archetype 2.0 voltmeter test video

Our collaboration with a renowned compounding company, known for its work with top technology firms such as Apple, Tesla, and SpaceX, has resulted in the development of a unique iON SYNC composite material. This material blends the robust properties of shoe outsole rubber with the required conductivity to meet the standards for therapeutic earthing (less than 10^3 Ohms resistance).

Stack Height: 8.5mm (3.5 rubber + 5mm insole)
Heel to Toe Drop - 0
Upper: 220g Polymesh
Water Repellent: Minimal DWR on outer polymesh
Outsole: High Abrasion, HIgh Grip Rubber
Weight (pair): .925 lbs 0r 14.8 oz
Machine Washable: Yes
Vegan: Yes
Gender: Unisex

iON SYNC® is Patented Technology

FAQ

Does one iON SYNC plug offer enough conductivity for therapeutic earthing?
Our medical grade iON SYNC composite material meets the standards for therapeutic earthing (less than 10^3 Ohms resistance). Any sweat that wicks into the insole expands the conductive surface to the greater portion of the sole, therefore enhancing electron transfer to the foot.

Are the Ion Sync® earthing plugs watertight?
Yes, all the earthing plugs are compression fit into the outsole making for a solid rubber seal. Also keep in mind the tabi shoes feature fabric between the toes which is the most likely area for moisture infiltration.

Can you feel the Ion Sync® earthing plugs underfoot?
If you feel for the Ion Sync® plugs you can feel them underfoot but after wearing the shoes for a while they go unnoticed.

Do iON SYNC® earthing plug contain latex?
No, our iON SYNC® earthing plugs are latex-free.

Will the Ion Sync® earthing plugs wear out?
The Ion Sync® earthing plugs are recessed and sit flush with the outsole tread at the midfoot so they are well protected. Their resilient rubber composition combined with their strategic positioning exposes them to low wear for max longevity. If they do happen to wear out, they can easily be replaced.

Shoe Warranty Policy
The minimalist footwear companies we partner with and enhance with iON SYNC technology for reselling as earthing shoes comes with a 30-day retailer warranty. If your shoes fail due to defective materials or craftsmanship—such as a split sole or unraveled stitching—we’ll repair, replace, or refund them, at our discretion. This warranty begins from the date of purchase and applies only to products bought directly from us.