Here are Singapore websites where you can shop sustainable or more-ethical clothing options, with a short note about what each offers and a source you can check:

• Zalora (Earth Edit) — large regional marketplace with a curated “Earth Edit” section for pre-loved, sustainable-material and certified/verified items. (Zalora.sg)
• Carousell / Refash — major local platform for preloved clothing and Refash (recommerce/thrift specialist) — good for second‑hand shopping and circular fashion. (Carousell.sg)
• The Green Collective — Singapore multi-brand retailer (online + physical) focused on ethical, fair‑trade and sustainable fashion labels. (thegreencollective.sg)
• We Are Sui (wearesui.com) — Singapore-based slow‑fashion label selling handmade / sustainable-fabric garments (Tencel, organic, handwoven). (sg.wearesui.com)
• Refash.sg — recommerce marketplace (now linked with Carousell) for curated secondhand women’s clothing and in-store thrift options. (en.wikipedia.org)
• Love, Bonito — Singapore-born brand that has publicly described sustainability/circularity initiatives (long‑wear design, inventory practices and some sustainable materials). Check product pages for specific sustainable claims. (businesstimes.com.sg)
• Naiise — multi‑label local marketplace that (when active) stocks local designers and some sustainable / artisanal fashion; note company has had business changes in recent years — check current site status. (vulcanpost.com)

Quick tips for finding sustainable options on these sites:

• Look for explicit labels/filters like “pre‑loved”, “organic”, “recycled”, “Tencel/Lyocell”, “Fair Production” or platform sustainability collections (e.g., Zalora Earth Edit). (Zalora.sg)
• Prefer pre‑owned / recommerce (Carousell / Refash) to lower environmental impact. (Carousell.sg)

If you’d like, I can:

• Narrow this to only small Singapore brands that make sustainably (local slow‑fashion labels), or
• Pull current sustainable-filtered product pages (e.g., Zalora Earth Edit listings or Refash pre‑loved categories) and share a few example items/links.