Location

USA

Founded

2020

Price range

$99 – $150

Shipping

Worldwide

Catalogue

51 products

Size range

XS–XL

Flux Footwear Brand Logo

Flux Footwear

Independent brand — verified
About

Flux Footwear is a US shoe brand that describes itself as founded in 2020. Its founding team includes Isaac Mertens and Zach Frey; Frey brought experience as a footwear designer at Reebok. The brand set out to make shoes that allow more natural foot movement while still offering styles for training and daily wear. The range includes the Adapt Trainer, Adapt Runner and Adapt Trail Runner. Wide toe boxes and zero-drop soles—where the heel and forefoot sit at the same height—are recurring features. The models serve different uses: the knit trainer prioritises flexibility, while the runners add cushioning or features suited to trails. Flux describes its footwear as barefoot-inspired, but shoppers should compare the sole and cushioning of each model rather than assume every pair feels the same underfoot. Flux sells through its official website, with product-specific sizing and return information. People new to this type of shoe may find the brand’s guidance on gradually getting used to the fit useful before choosing one for regular training.

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Brand Details

Not disclosed
USA
Last reviewed
Sep 2026
Independent brand
Verified
I
Isaac Mertens
Z
Zach Frey

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Frequently asked questions

Who founded Flux Footwear, and when was it established?
Flux Footwear was founded in 2020 by friends interested in health, fitness and natural movement. The supplied data names Isaac Mertens and Zach Frey, although the official About page does not list individual founders.
What kind of footwear does Flux make?
Flux produces flexible trainers, road-running shoes, trail shoes, high-top trainers and waterproof styles. The collection is positioned between barefoot-inspired footwear and cushioned athletic shoes for training, walking and everyday movement.
What does zero-drop mean in Flux shoes?
A zero-drop sole places the heel and forefoot at approximately the same height. Flux combines this construction with flexible soles and wide toe boxes designed to allow the foot to spread and move more naturally.
What comfort features do Flux shoes include?
Features vary by model but may include stretch-knit uppers, wide toe boxes, lightweight construction and AdaptSol insoles with more than 100 massage nodes. Trail models add outsoles designed for greater traction.
Are Flux shoes vegan or made with recycled materials?
Selected Flux models use recycled stretch-knit uppers and are described as vegan. Material composition differs across the range, particularly for leather and waterproof designs, so customers should check the specific product specifications.
Can Flux shoes be machine-washed?
Several knit runners and trainers are identified as machine-washable. This does not necessarily apply to leather or waterproof models, so owners should confirm the care instructions supplied for their exact pair before washing.

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