Every Circle product is designed to deliver both performance and a positive impact on the planet. Our shoe is crafted from materials that are 75% bio-based. Manufactured in Portugal, it ensures ethical practices across the entire production process. We achieved a perfect 5/5 traceability score from Fairly Made. In March 2024, Circle earned B Corp certification with a score of 96.1.
PROWEAVE™ UPPER
The lightweight, thermoregulating, and durable upper is made from bio-based materials. ProWeave™ technology enhances durability, breathability, and thermal regulation. The bio-based fibers are a blend of 50% certified Woolmark® wool and 50% TENCEL™
Lyocell Filament. Crafted in Italy, these fibers are carefully spun for exceptional strength. Winner of the Footwear Eco Award at Performance Days, March 2024.
FOXING
The external reinforcements, eyelets, and foxing are made from Mirum®—a non-woven material that’s both flexible and abrasion-resistant. Mirum® is produced in the U.S. using natural rubber, plant oils, natural pigments, and responsibly sourced minerals.
LACES
Made from GOTS-certified organic cotton.
INSOLE
Made in Portugal from natural fibers, natural rubber, and Merino wool.
MIDSOLE
The PLNT-FOAM™ midsole, made with 45% bio-based content from castor beans, provides optimal cushioning and maximum energy return. SuperCritical Foaming technology ensures the best balance of weight and performance. The first midsole of its kind manufactured in Portugal—and in Europe.
OUTSOLE
Made from 70% bio-based rubber. Releases no harmful microplastics.
Made in Portugal, the SuperNatural Runner is a unique running shoe crafted from 75% bio-based materials. Its reinforcements, finishes, and internal labels are also bio-based and manufactured in Europe. We minimize the use of adhesives compared to traditional running shoes, avoiding heat-bonded components that make recycling nearly impossible. At the end of its life, the adhesive can be reheated, allowing for easier sole disassembly. When your shoes are worn out, simply return them in their original box. We’ll handle the disassembly process. The midsole will be recycled into new high-performance polymer components. Circle Sportswear is proudly B Corp certified, with a score of 96.1.
Natural materials require special care. If your shoes get muddy or wet, here’s what we recommend: Remove the laces and take out the insole. Use a soft cloth and mild soap to clean the sole. Let them air dry naturally (you can stuff the shoes with newspaper to help speed up drying). DO NOT MACHINE DRY.
SIZE GUIDE
