From the search results, we can gather information about River Islands products, materials, and sustainability practices. Here are the key points:

Materials:

• River Island is committed to using more sustainable materials in all its products.
• The company is a proud member of Better Cotton and has been converting its cotton to be responsibly sourced from either Better Cotton, organic, or recycled sources.
• River Island only recognizes LenzingEcovero and Birla Livaecoviscose as sustainable viscose, and they must have a minimum content of 50% to be labeled as sustainable viscose.

Sustainability:

• River Island has established 12 commitments for people and the planet, which include sustainable materials, green chemistry, circularity, climate change, and transparency.
• The company aims to reduce water use by 50% in its products manufacturing process by 2030 and have 20% of suppliers on Higg Index Factory Social & Labour Module (FSLM) by the end of 2023.
• River Island is committed to identifying and preventing any type of slavery or human trafficking within the business and supply chain and ensuring regular checks are carried out at all production sites to ensure workers are treated fairly.
• The company has been spreading the joy of fashion for over 30 years and believes that fashion can be a force for good. Sustainability is now a key ingredient in its business, and it has established 12 commitments for people and the planet.

Positive:

• River Island is committed to using more sustainable materials in all its products.
• The company has established 12 commitments for people and the planet, which include sustainable materials, green chemistry, circularity, climate change, and transparency.
• River Island is committed to identifying and preventing any type of slavery or human trafficking within the business and supply chain and ensuring regular checks are carried out at all production sites to ensure workers are treated fairly.
• The company believes that fashion can be a force for good, and sustainability is now a key ingredient in its business.

Negative:

• In July 2023, River Island pulled back some items from its stores due to finding unhealthy amounts of toxic chemicals on them.

In summary, River Island is committed to using more sustainable materials in all its products and has established 12 commitments for people and the planet. The company is also committed to identifying and preventing any type of slavery or human trafficking within the business and supply chain. However, the company has had some issues with toxic chemicals found on some of its products.