(Almost) all the questions you had for the Balena team, in one straightforward page!
Want to learn more? Check out our glossary section for all the main terms defining the Balenaverse

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Are the slides unisex?

Yes. BioCir™ Slides are designed to be worn by both men and women, with a range of sizes to fit both.

How does Balena’s take-back program work?

Once you finished wearing your BioCir™ Slides, their journey does not stop there, we will make sure to take them back and to get them composted in one of our industrial compost facilities ensuring the full decomposition and biodegradation of the material back to the ground safely, and by that completing a fully circular process. Send us an email to hello@balena.science and we will be in touch with you.

Is BioCir™ 100% compostable?

BioCir™ is a thermoplastic elastomers material that is 100% compostable and biodegradable in an industrial compost condition. Our composition is based on fully biodegradable materials that meet U.S. (ASTMD6400-04) and E.U. (EN 13432) standards for composting in industrial composting facilities. 

Is the packaging of the BioCir™ Slides sustainable?

Yes, we use 100% recyclable paper boxes.

What are the brown particles in the material?

The first batch of the BioCir™ Slides is made with natural colorant with the main ingredient of the colorant being cinnamon. 

What does Balena mean?

In Italian, Balena means Whale. In the bible, whales symbolize the godly creation of immense existence, reminding the earthly beings how small and humble they are in comparison to godly creation.

What is BioCycling?

BioCycling is the ability to control a product’s end-of-life status.
The product goes through decomposition and biodegradation in a biological environment without leaving any waste or contamination behind that could be dangerous to the earth and seas.

What is the BioCir™ material?

BioCir™ is Balena’s first developed material. Flexible and fully compostable thermoplastic material,it reduces toxic, fossil fuel-based materials used in the fashion and footwear industries. By modifying and binding natural, easily scalable ingredients with biodegradable polymers, BioCir™ is an injectable, soft, and durable material that can be used for 3D printing using filaments, or in pallets for mass production injection molding. Products made of BioCir™ reach their end of life responsibly by breaking down to carbon dioxide, water, and other naturally occurring minerals that seamlessly biodegrade, avoiding the pollution of earth and seas. Allowing for the completion of a fully circular process required for a sustainable future.  

Will the BioCir™ Slides decompose on my feet?

No, our  BioCir™ Slides are designed to decompose in an industrial compost facility.

Where were the BioCir™Slides designed?

BioCir™ Slides are designed and developed in Italy.

What are the BioCir™Slides?

The  BioCir™ Slides are the first product made entirely of  BioCir™, the first flexible and fully compostable material of its kind.

What are the features of BioCir™?

BioCir™ material is an injectable, soft, durable and flexible material that is 100% compostable and biodegradable.




A material science company, developing compostable and biodegradable thermoplastic materials, on a mission to create a circular model for consumer goods products.


Biobased materials refer to products whereby the source of carbon is derived from naturally occurring, sustainable resources.


BioCir™is the unique biodegradable combination of naturally occurring constituents binded by high molecular weight polymers and modifiers, that enable its elastomeric functionality for consumer goods and beyond. 


BioCycling is the ability to control a product’s end-of-life status in a biological recycling mechanism. The products go through decomposition and biodegradation in an industrial compost facility without leaving waste or contamination.


Biodegradable refers to material that can be consumed by microbial activity, being bacteria and/or fungi, into carbon dioxide, water, and microbial biomass. Biodegradable polymers require specific conditions to biodegrade, usually in an industrial compost facility. 


Bioplastics are not classified into a single class of material, however, are usually referred to as biodegradable or bio-based polymers. 


Compostable is used to describe a product that can disintegrate into the environment into non-toxic, basic building blocks. Compostable products break down into smaller compounds with the help of biological organisms, in a specific time frame in a controlled environment to produce compost that is non-toxic and can enhance soil and support plant life.


Decomposition is a process that takes place when bacteria and other microorganisms consume biodegradable materials. Temperature, moisture, and atmosphere play a crucial role in initiating decomposition. 

End of life

End of life in the context of manufacturing and product life cycles, is the final stage of a product’s existence when it reaches the end of its useful life.

Industrial compost facility

An industrial compost facility closely monitors and controls the composting process on a large scale. Through the measurement of water, carbon, and nitrogen-rich inputs, compost facilities, biodegrade materials quickly and efficiently into non-hazardous waste that can be sold as a fertilizer to farms, plant nurseries as well as individuals. 


A molecule is a group of two or more atoms that form a small unit into which a pure substance can be divided while retaining the composition and chemical properties of the substance.


A polymer is any substance composed of very large molecules called macromolecules, having a repeating chemical unit.  Polymers make up many of the materials in living organisms as well as the basis of man-made materials. 


Slides are a type of light footwear that are characterized by having a loose heel that holds on to the foot from the front.


at Balena, sustainability means creating, designing, and developing new materials that reach their end of life responsibly, including the full decomposition and biodegrading of the material back into the ground safely, without polluting the land and the seas.


A class of polymer that can be shaped and reshaped, while softened through heating and processed using methods such as extrusion, injection molding, and thermoforming.

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