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Materials & Sustainability

Comparing Modal/TENCEL™, Cotton & Bamboo

Raw materials and processing

Zero Waste Global encourages hotels to choose textiles that minimise environmental impact while offering exceptional quality. This page compares three common fibres—Modal (TENCEL™ Modal/Lyocell), conventional cotton and bamboo—across key sustainability metrics. It focuses on raw materials, water usage, chemical processes, biodegradability and microfiber release. A bar chart visualises typical water consumption for each fibre.

Fibre

Raw material & cultivation

Processing & chemicals

Notes

Modal (TENCEL™ Modal/Lyocell)

Made from beech trees and other sustainably managed wood. Lenzing sources wood from certified forests and requires less land than cotton[1]. Eucalyptus plantations for TENCEL™ need about one quarter of the water required by cotton plantations[2]

Made from beech trees and other sustainably managed wood. Lenzing sources wood from certified forests and requires less land than cotton[1]. Eucalyptus plantations for TENCEL™ need about one quarter of the water required by cotton plantations[2]

Because of the closed loop, TENCEL™ has a 99.3 % lower water scarcity score than conventional cotton[5]

Conventional
cotton

Derived from cotton plants grown across semi‑arid regions. Cotton requires large areas of farmland and competes with food crops.

Cotton cultivation is thirsty—it takes 10,000–20,000 litres of water to produce one kilogram of cotton fibre[6][7]. Irrigation often draws water from stressed river basins, contributing to water scarcity. Heavy pesticide and fertiliser use damages soil and waterways.

Cotton accounts for 69 % of the textile industry’s water footprint[6]. Organic cotton reduces chemical inputs but still needs irrigation in many regions.

Bamboo

Bamboo is a fast‑growing grass. Natural bamboo cultivation requires 300–500 litres of water per kilogram of fibre and is primarily rain‑fed[8]. It grows on marginal land and often requires no pesticides

Mechanically processed bamboo (bamboo linen) involves crushing and retting the fibres; no harsh chemicals but labour-intensive. Bamboo viscose is produced via a chemical process similar to rayon: wood pulp is dissolved in caustic soda and carbon disulphide, then extruded. The water footprint of bamboo viscose is ~3,000 L/kg of yarn[9] and many factories recover only ~50 % of chemicals[10], leading to wastewater issues.

Pure bamboo fabric (linen) is biodegradable and produces minimal microfibers, but it is rare and expensive. Most “bamboo” clothing is viscose, which sheds microfibers and relies on chemical processing.

Modal (TENCEL™ Modal/Lyocell)

Raw material & cultivation

Made from beech trees and other sustainably managed wood. Lenzing sources wood from certified forests and requires less land than cotton[1]. Eucalyptus plantations for TENCEL™ need about one quarter of the water required by cotton plantations[2]

Processing & chemicals

Made from beech trees and other sustainably managed wood. Lenzing sources wood from certified forests and requires less land than cotton[1]. Eucalyptus plantations for TENCEL™ need about one quarter of the water required by cotton plantations[2]

Notes

Because of the closed loop, TENCEL™ has a 99.3 % lower water scarcity score than conventional cotton[5]

Conventional cotton

Raw material & cultivation

Derived from cotton plants grown across semi‑arid regions. Cotton requires large areas of farmland and competes with food crops.

Processing & chemicals

Cotton cultivation is thirsty—it takes 10,000–20,000 litres of water to produce one kilogram of cotton fibre[6][7]. Irrigation often draws water from stressed river basins, contributing to water scarcity. Heavy pesticide and fertiliser use damages soil and waterways.

Notes

Cotton accounts for 69 % of the textile industry’s water footprint[6]. Organic cotton reduces chemical inputs but still needs irrigation in many regions.

Bamboo

Raw material & cultivation

Bamboo is a fast‑growing grass. Natural bamboo cultivation requires 300–500 litres of water per kilogram of fibre and is primarily rain‑fed[8]. It grows on marginal land and often requires no pesticides

Processing & chemicals

Mechanically processed bamboo (bamboo linen) involves crushing and retting the fibres; no harsh chemicals but labour-intensive. Bamboo viscose is produced via a chemical process similar to rayon: wood pulp is dissolved in caustic soda and carbon disulphide, then extruded. The water footprint of bamboo viscose is ~3,000 L/kg of yarn[9] and many factories recover only ~50 % of chemicals[10], leading to wastewater issues.

Notes

Cotton accounts for 69 % of the textile industry’s water footprint[6]. Organic cotton reduces chemical inputs but still needs irrigation in many regions.

Environmental impact considerations

Land use and biodiversity

Modal (TENCEL™)

Beech and eucalyptus trees grow on non‑arable land and require less area per tonne of fibre than cotton[1]. Lenzing’s sustainable forestry practices protect biodiversity.

Cotton

Large plantations compete with food crops and often lead to soil degradation and habitat loss. Conventional cotton relies on monoculture systems.

Bamboo

Because of the closed loop, TENCEL™ has a 99.3 % lower water scarcity score than conventional cotton[5]

Chemical inputs
and pollution

Modal (TENCEL™)

Uses non‑toxic solvents with a closed‑loop recovery system, which minimises chemical discharge[3].

Cotton

Conventional cotton uses large quantities of fertilisers and pesticides; run-off pollutes waterways and affects worker health.

Bamboo

Production uses carbon disulphide and caustic soda; chemical recovery rates vary, and wastewater is a significant issue[10]. Mechanically processed bamboo avoids these chemicals, but is less common.

Biodegradability
and microfiber release

Modal (TENCEL™)

Fibres are biodegradable and compostable under industrial conditions; they shed fewer microfibers than many synthetic fabrics.

Cotton

Natural cotton fibres are biodegradable, but may carry pesticide residues. Microfiber release is lower than that of synthetic fibres, though washing still releases some fibres.

Bamboo

Cotton accounts for 69 % of the textile industry’s water footprint[6]. Organic cotton reduces chemical inputs but still needs irrigation in many regions.

Aspects

Modal (TENCEL™)

Cotton

Bamboo

Land use and biodiversity

Beech and eucalyptus trees grow on non‑arable land and require less area per tonne of fibre than cotton[1]. Lenzing’s sustainable forestry practices protect biodiversity.

Large plantations compete with food crops and often lead to soil degradation and habitat loss. Conventional cotton relies on monoculture systems.

Because of the closed loop, TENCEL™ has a 99.3 % lower water scarcity score than conventional cotton[5]

Chemical inputs
and pollution

Uses non‑toxic solvents with a closed‑loop recovery system, which minimises chemical discharge[3].

Conventional cotton uses large quantities of fertilisers and pesticides; run-off pollutes waterways and affects worker health.

Production uses carbon disulphide and caustic soda; chemical recovery rates vary, and wastewater is a significant issue[10]. Mechanically processed bamboo avoids these chemicals, but is less common.

Biodegradability
and microfiber release

Fibres are biodegradable and compostable under industrial conditions; they shed fewer microfibers than many synthetic fabrics.

Natural cotton fibres are biodegradable, but may carry pesticide residues. Microfiber release is lower than that of synthetic fibres, though washing still releases some fibres.

Cotton accounts for 69 % of the textile industry’s water footprint[6]. Organic cotton reduces chemical inputs but still needs irrigation in many regions.

Conclusion

Modal (TENCEL™ Modal/Lyocell) demonstrates significant sustainability advantages over conventional cotton and bamboo viscose. It uses far less water, requires less land, and employs a closed‑loop manufacturing process that recycles almost all solvents and water[5][4]. Conventional cotton remains the most water‑ and chemical‑intensive option, while bamboo offers benefits when mechanically processed but poses challenges when converted to viscose[11][10]. Selecting materials with low water footprints and responsible production methods is crucial for hotels aiming to reduce their environmental impact.