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Sustain by Kat Review: Sustainable and Ethically Sourced Chemical Free Clothing

Sustain by Kat

Sustain by Kat fibre breakdown, read to the Throne Standard:

These figures come from the 97.4% of Sustain by Kat’s 78-product catalogue that has been read. The remaining 2 products (2.6%) publish no fibre composition anywhere we can read, so they are counted in the catalogue total but sit outside the percentages above, and are listed in full below.

Fibre Styles %
100% plant (organic/regenerative cotton, linen, hemp) 33 82.5%
Other/Unclear (no stated composition) 7 17.5%
55 / 5Eco rating · Fully natural · 100% plant fibre · 77 products scanned
77 products%
100% plant fibre100%
Animal fibre6.9%
Synthetic0%
Semi-synthetic0%
Unclear / unstated0%

A product made from more than one class of fibre is counted once in each, so these shares add to more than 100%.

77 Products Scanned

2026-08-04
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What this scan could read
42.9%
of the range read
33 / 77
products with a published composition

Every product listed in Sustain by Kat's live catalogue is retrieved and its stated fibre composition read individually, from the Sustain by Kat product page, Sustain by Kat's own product data and its material labels. A fibre percentage for Sustain by Kat is published only when 100% of the Sustain by Kat catalogue has been read. Items Sustain by Kat sells that carry no clothing textile, such as gift cards, packaging, jewellery and homeware, are excluded from the percentage rather than counted as a pass or a fail.

Not recorded (44): These products carry no fibre composition the brand publishes anywhere we can read. They are counted in the catalogue total but excluded from the fibre percentage, and linked so you can check them yourself.

See the 44 products with no published composition
  • Ayurvedically-dyed Shorts – Sustain by Kat
  • Undyed Linen Tee – Sustain by Kat
  • Snow White – Sustain by Kat
  • Undyed Organic Racerback – Sustain by Kat
  • Ayurvedically-dyed Indigo – Sustain by Kat
  • La La Lace Tank – Sustain by Kat
  • Written with Walnuts Classic Racerback – Sustain by Kat
  • Organic Indigo Leaf Dyed Jean Shorts – Sustain by Kat
  • Undyed Organic PJ Cami – Sustain by Kat
  • Plant-dyed Shibori Tee – Sustain by Kat
  • Plant-dyed Scarf – Sustain by Kat
  • Christmas Tree Long Sleeve Onesie – Sustain by Kat
  • Snowman Long Sleeve Onesie – Sustain by Kat
  • Indigo Swirl Kids Long Sleeve – Sustain by Kat
  • Kids Sunburst Tee – Sustain by Kat
  • Kids Organic Plant-dyed Shibori Dress – Sustain by Kat
  • Kids Organic Plant-dyed Shibori Dress – Sustain by Kat
  • Avocado-dyed Shibori Tee – Sustain by Kat
  • Organic Weld Seeds – Sustain by Kat
  • Plant-dyed Muscles & Lace – Sustain by Kat
  • Ayurvedic Cami – Sustain by Kat
  • Naturally-dyed Colorblock Top – Sustain by Kat
  • Plant-dyed Tunic – Sustain by Kat
  • California Grown Plant-dyed Linen Tee – Sustain by Kat
  • Plant-dyed Racerback – Sustain by Kat
  • Plant-dyed Linen Tee – Sustain by Kat
  • Lavender & Chamomile Dyed Cami – Sustain by Kat
  • Lavender & Chamomile Dyed Shorts – Sustain by Kat
  • Undyed Organic PJ Shorts – Sustain by Kat
  • Plant-dyed Organic Cotton Thread – Sustain by Kat
  • Undyed Organic Cotton Thread – Sustain by Kat
  • Kids Organic Plant-dyed Shibori Dress – Sustain by Kat
  • Kids Shibori Tee – Sustain by Kat
  • Kids Organic Plant-dyed Shibori Dress – Sustain by Kat
  • Kids Organic Plant-dyed Shibori Dress – Sustain by Kat
  • Plant-dyed Scarf – Sustain by Kat
  • Plant-dyed Scarf – Sustain by Kat
  • Plant-dyed Scarf – Sustain by Kat
  • Plant-dyed Scarf – Sustain by Kat
  • Plant-dyed Scarf – Sustain by Kat
  • Plant-dyed Scarf – Sustain by Kat
  • Plant-dyed Scarf – Sustain by Kat
  • Plant-dyed Scarf – Sustain by Kat
  • Plant-dyed Scarf – Sustain by Kat

Excluded (4): These are the items Sustain by Kat sells that carry no clothing textile to rate: gift cards, packaging and returns kits, jewellery, homeware, toys, body care and checkout line items. Sustain by Kat's fibre percentage leaves them out rather than counting them as a pass or a fail.

See the excluded items
  • Plant-Based Lake Pigments – Sustain by Kat
  • Indigo Organic Cotton/Linen Napkins – Sustain by Kat
  • Indigo Organic Cotton/Linen Dish Towels – Sustain by Kat
  • Indigo Organic Cotton/Linen Tea Towels – Sustain by Kat
How we scan. Every figure on this page comes from the Throne Standard scan: we read the fibre composition off each live product on the brand’s own site, style by style, and count only single-fibre plant cloth (cotton, linen, hemp) as natural. Animal fibres such as wool, silk and cashmere and plastic-based synthetics such as polyester, nylon and elastane sit outside the plant-fibre figure, and regenerated fibres such as viscose, bamboo, modal and Tencel are counted as semi-synthetic. Percentages are calculated over the styles that state a composition; anything unlabelled is shown separately.

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