男士 BIOS 运动鞋（午夜）
男士 BIOS 运动鞋（午夜）
This style fits true to size. For a perfect fit we recommend to measure your foot, reference the size chart, or try them on by printing a template where provided.
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Eco Friendly
Natural Materials
Grounding
Earthing
Barefoot
Wide Toe Box
Product details
Product details
Carbon Chic
Meet Carbon Casual - a laid-back slip-on with a grounded twist. Designed with carbon-infused rubber in the sole and soft, matte-finish nubuck up top, it brings together easy comfort and everyday function. Clean lines, neutral tones, and just the right amount of polish. Slip in, head out, stay grounded.
Best For
Walking, grounding, warm or cool weather, all-day wear.
Features
Barefoot DesignWide Toe Box for natural splay and stability.
Moldable & Flexible Thin leather built in insole and midsole that soften and molds to your foot with just a few days of wear.
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Grounding TechnologyUsing our proprietary Direct GroundSync™ conductive technology, molded into the outsole.
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Zero Drop & No Toe SpringNo heel elevation or elevated toe box. Heels and toes are flat. For improved foot strength, body posture and gait.
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Chromium FreeChromium free leather Upper linning and Footbed
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Natural MaterialsPremium metal-free nubuck leather upper, Buffalo leather footbed and Sheepskin linning.
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Minimal Natural CushioningMinimal natural latex insert in heel for added comfort.
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Rubber OutsoleFor improved grip and traction.
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Materials
Upper
- 100% Premium Chromium/metal-free Nubuck leather
Lining
- Footbed – 100% CR/Metal-Free Buffalo leather, 100% conductive copper rivet, Silver conductive stitching, natural latex internal heel padding
- Upper linning - 100% CR/Metal-Free Sheepskin
Outsole
- Outsole – Gum rubber outer ring
- Interior Pad – Proprietary conductive carbonized rubber
Midsole
- Midsole – cowhide leather
Weights & Measures
- Stack height – 8 mm
- Weight – 240g (Per shoe in size US M9)
Shipping & returns
Shipping & returns
Under-groundz members get FREE domestic standard shipping and hassle-free returns in the US on every order. Sign up
SALE shoes purchased during a sales period can be returned for a full refund, minus an $11 fee for a return shipping label. FINAL SALE items are non-refundable.
Visit our Shipping & Returns page for more details.
Sizing & fit
Sizing & fit
Carbon Casuals should fit snug, even tight at first as they will stretch. They will “break in” and take the shape of your feet within days to a few weeks depending on frequency of wear.
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DIRECT GroundSync™ TECHNOLOGY
Our new conductive outsole pad features our proprietary carbon infused rubber, supported by silver stitching and anchored with a solid copper rivet - a highly conductive, antimicrobial metal known for its durability and wellness benefits. This design maintains a continuous connection to the Earth’s natural surface charge, helping to discharge excess electrical buildup in the body. Grounding while wearing the Carbon Casuals may support reduced inflammation and pain, faster recovery, improved circulation, better sleep, and more balanced biological rhythms. More than just a sandal.
NATURALLY FOOT-SHAPED
Our barefoot shoes are anatomically designed to move the way you do-foot-shaped, flexible, and built for lasting comfort. A zero-drop sole keeps your posture aligned and your stride natural, while the wide toe box lets your toes spread, grip, and relax. No arch support means your feet do the work, getting stronger with every step. The minimal sole molds to your foot for just-right comfort and connection to the ground. Feel more. Move better. Stay grounded.
NATURAL BY DESIGN
We use natural materials throughout our shoes and sandals- sustainably sourced, chromium-free, eco-friendly leather, along with soft wool and breathable cotton. Every material is chosen with care, not just for comfort and durability, but to minimize environmental impact and support the health of the wearer. It's our way of staying grounded in both purpose and design.
