TET. Responsible Wear is a sustainable fashion brand that emphasizes ethical production and the use of eco-friendly materials. Founded by Lieke van Hulsbergen in 2019, the brand emerged from her concern about the plastic waste she encountered during her travels. TET. Responsible Wear produces stylish garments using recycled and organic materials, such as Repreve, linen, hemp, organic cotton, and recycled polyester.

The brand's commitment to sustainability and social responsibility is reflected in its B Corp certification, which highlights their dedication to high standards of environmental and social performance, transparency, and accountability. TET. Responsible Wear also focuses on supporting marginalized communities and empowering women through its production processes, which take place in local factories in Bali.

Their collection includes clothing and swimwear, with bikinis being particularly popular for their timeless design. Prices typically range from €50 to €150, and they offer international shipping, with free delivery on orders over €200.