Here are Malaysian stores and retailers that carry sustainable clothing (either dedicated sustainable brands/curated eco shops, mainstream chains with “sustainable” collections, or popular second‑hand / circular platforms). I’ve listed each with a short note and a source.

Mainstream retailers with sustainable collections

• H&M — offers its “Conscious” / reuse and recycling initiatives at Malaysian stores (in‑store garment collection and Conscious items). (therakyatpost.com)
• Zara (Inditex) — markets its “Join Life” / recycled‑fibre and circular initiatives; Join Life pieces are sold in markets where Zara operates, including Malaysia. (teenvogue.com)
• Uniqlo — runs global sustainability lines and initiatives (RE:UNIQLO / material and recycling programmes) that are rolled out in many markets; Malaysian Uniqlo stores participate in corporate sustainability efforts. (brandradar.org)

Dedicated eco / curated multi‑brand stores (Malaysia)

• UNPLUG (online + KL presence) — Malaysian eco‑store that curates sustainable apparel and other conscious brands. (shopunplug.com)
• Real.m — Malaysian online shop curating responsible designers and eco pieces (clothing, bamboo textiles, etc.). (discoverkl.com)
• Unplug Movement / other local eco marketplaces — curated platforms that stock multiple Malaysian sustainable labels. (shopunplug.com)

Malaysian sustainable brands and local designers (sold direct or through the above shops)

• Terrae — Malaysian activewear using Econyl (regenerated nylon), eco packaging and limited/low‑impact production. (thesmartlocal.my)
• Biji‑Biji, Fondest, Munimalism, Kanoe Wear, Kapten Batik, STUF, Upsygals, Revive — locally made or upcycled labels noted in Malaysian roundups for sustainable practices (upcycling, natural dyes, limited runs, recycled materials). (thesmartlocal.my)

Second‑hand, circular and rental options (widely used in Malaysia)

• Carousell Malaysia — large marketplace for preloved clothing and thrifted finds. Good for circular shopping. (brandradar.org)
• Local upcycling sellers / Instagram boutiques (e.g., Revive, Upsygals) and pop‑up sustainability markets — common ways to buy repaired, repurposed or upcycled clothing. (coconuts.co)

Where to look in person

• Major malls and outlet centres in KL, Penang and Johor carry H&M, Zara and Uniqlo; local eco shops and pop‑ups often appear in markets and events (e.g., sustainability weekends). (therakyatpost.com)

Quick tips when shopping for “sustainable” clothing

• Check labels/materials (organic cotton, Tencel/lyocell, recycled polyester/Econyl, deadstock).
• Look for limited runs, transparent supply info, upcycling or take‑back programmes.
• Prefer second‑hand/repair/rental when possible — biggest immediate climate impact reductions.

If you want, I can:

• Make a short map/list of sustainable stores in a specific Malaysian city (Kuala Lumpur, Penang, Johor), or
• Pull official sustainability pages for H&M, Zara, Uniqlo Malaysia and a few local brands so you can compare claims side‑by‑side.