Sisal is a group of fibres extracted from a type of agave plant. These fibres are known for their stiff, durable and strong properties. Other properties of sisal fibres include: 
- Rot resistance
- Moth resistance
- Antibacterial resistance
- Stain resistance. 
These properties make sisal great for use in bathrooms and homes with children and pets.

sisal sustainability - EcoPByLeo
In terms of sustainability, sisal is organically grown, as no pesticides or chemical fertilizers are used. It is also a highly renewable plant that is resistant to drought. This level of sustainability favours it over other fibres, both natural and synthetic. As it is a natural fibre this means it easily compostable at the end of its life cycle.