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BLACK FRIDAY BESTSELLERS: 20-30% OFF

ENDS IN

59/23/28/11/2025

FLASH SALE: 30% OFF ON SELECT STYLES

ENDS IN

59/23/28/11/2025

BLACK FRIDAY NOW LIVE: 20-70% OFF ALMOST EVERYTHING

FREE SHIPPING ABOVE $150 - FREE EXCHANGES -

Terms

Orders placed between November 14th and December 31st will have an extended exchange window for the holidays. After the regular 14-day return window has ended, orders will not be eligible for a refund, but can be exchanged or returned for store credit until January 11th, 2026.

A $14 shipping and processing fee will apply to all returns/exchanges. You can waive this fee by opting into Checkout+ for $7.98 at the time of purchase.

Promotions cannot be combined for additional discounts. Accessories are excluded from any site promotion.

Items on sale with a 25% or more discount are eligible for exchange only. Exchange Only items cannot be refunded, but can be exchanged for a different size, a different item, or store credit.

Final Sale items are discounted by 50% or more, and cannot be returned or exchanged.

Women

Mello Leather Sneaker

$276.00 $345

(20% off)

$345
Color Summit Summit
Summit

Color

Size

Only 3 left in stock

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Details

Introducing the Mello, a first-of-its-kind luxury sneaker that restores the planet—and biodegrades back into it. Handcrafted in Italy with Zeolite-tanned regenerative leather (meaning it's free from heavy metals), this Summit colorway is set on a lightweight and durable LACTAE HEVEA® sole that's handmade from responsibly sourced hevea-tree milk. The recycled corn, wool, and kenaf insole delivers cushioned comfort all day long.

The outsoles may differ in shades of 'cream' due to the different levels of carotene in hevea milk tree which is the natural property of a biodegradable sole.

  • Handmade in Tuscany, Italy
  • Constructed from Zeolite-tanned full-grain regenerative calf leather
  • Partially lined with LWG-certified Italian calf leather 
  • Set on a 100% natural LACTAE HEVEA® sole
  • Tightly stitched for water resistance
  • Threaded with organic cotton laces
  • Fitted with a removable biodegradable insole (Corn, wool, kenaf)

Please note that regenerative leathers are uniquely textured and may have subtle markings, which highlight the beauty of a life spent grazing in the Alpine pastures.

 

Care Instructions: These are easy to maintain with the right approach:
  • Before first wear (optional): Apply a light, even coat of our Eco Protect Spray from a distance—just a fine mist, not saturated. You can reapply every few weeks for extra protection.
  • Cleaning: Brush off dry dirt and debris with a microfiber cloth. Skip traditional shoe cleaners—they can interfere with the leather’s natural properties.
  • Water contact: Try to avoid water when possible, as it can cause discoloration. If water droplets do get on them, gently wipe away with a slightly damp cloth.
  • Storage: Keep them in a cool, dry, dark place for long-term storage, as the leather can be sensitive to prolonged sunlight exposure.


To learn more about the regenerative leather Koios, tap here.

Size & Fit


  • Fits true to size. Take your normal US size.
  • Only available in full sizes. Go up to the nearest whole size if you wear a half size.
  • Width B - Standard
  • Unlined construction, has a soft feel and relaxed fit.
  • Width can be adjusted by tightening/loosening the laces.
  • Not sure of your size? Reach out to our team for a recommendation.

      Sustainability

      Regenerative leather: Our regenerative leather is sourced from regenerative farms in the Swiss Alps. These farms are reviving Alpine ecosystems by reversing carbon emissions, restoring soils, and increasing biodiversity. Learn more here.

      Zeolite tanning: Zeolite tanning is an innovative and more environmentally friendly alternative to chrome tanning. It involves tanning the hides with minerals rather than chrome, aldehyde, and heavy metals.

      LACTAE HEVEA® sole: LACTAE HEVEA® soles are made in France using responsibly sourced milk from hevea trees. The entire process—from sourcing the milk to pouring it into molds—is completed by hand.

      Organic cotton: This sneaker's laces are certified organic, meaning the fibers are organically grown and manufactured without harmful chemical inputs.
      Biodegradable materials: This sneaker's upper, laces, insole, and sole are biodegradable.

      Shipping & Returns

      Returns/Exchanges

      We accept returns and exchanges of most unworn and unused products within 14 days of delivery. A $14 fee will apply to all returns/exchanges. You can waive this fee by opting into Checkout+ for $7.98 at the time of purchase. Checkout+ provides free returns/exchanges, and also includes order protection. Items purchased with a discount may only be eligible for store credit or exchange, or may be final sale.

      International Orders

      We accept returns on international orders within 14 days of delivery for unworn and unaltered items. A $25 shipping label fee applies for all international returns, and original shipping fees are not refundable.

      Please see our full return policy here.

      Size Guide

      How it fits

      The Women's Mello fits true to size. If you wear a half size, we recommend you size up.

      US

      5

      6

      7

      8

      9

      10

      11

      UK

      3

      4

      5

      6

      7

      8

      9

      EU

      35

      36

      37

      38

      39

      40

      41

      We use standard US sizing on all styles.

      KOIO

      99% biodegradable

      Heavy-metal free regenerative leather

      100% natural LACTAE HEVEA® sole

      Insole made from plants like corn and kenaf

      Organic cotton laces

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      Customers Also Purchased

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      Care Bundle For Leather I KOIO

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      Give your leather Koios the care they deserve with this essential maintenance set — designed to clean, protect, and preserve.

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      Care Bundle For Suede Nubuck I KOIO

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      Specially curated for suede and nubuck styles, this kit gently refreshes and protects delicate materials without compromising texture.

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      Koio Dust Bag

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      Crafted from soft, breathable cotton that keeps your Koios dust-free and ready to wear.

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      Koio Shoe Tree

      Koio Shoe Tree

      $30

      Crafted from moisture-absorbing, odor-neutralizing wood that preserves your Koios’ structure over time.

      Size Small (M7, W5-9)

      Small (M7, W5-9)

      Large (M10-11)

      X-Large (M12-13)

      Medium (M8-9, W10-11)

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      Koio Eco Protect

      Koio Eco Protect

      $25

      Creates a water-resistant barrier and prevents stains. Suitable for suede and leather Koios.

      Add
      Koio Eco Cleaner

      Koio Eco Cleaner

      $25

      Effectively removes stubborn stains and scuffs. For use on leather Koios only.

      Add
      Koio Microfiber Cloth

      Koio Microfiber Cloth

      $10

      Keeps your Koios clean and dry to prevent damage.

      Add
      Koio Suede Brush

      Koio Suede Brush

      $15

      Remove stains and spots with this brush–suited for natural leathers like suede and nubuck.

      Add
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      Exchange/store credit. $20 restock fee. Mello Leather Sneaker in Summit

      To sell this item at its deeply discounted price while also maintaining responsible business practices, we need to charge a $20 restocking fee for exchanges.

      Eligible for exchange/store credit only.Mello Leather Sneaker in Summit

      This item is deeply discounted and as such, it cannot be returned for a refund. However, you may exchange it for a different item or store credit.