Short answer — several options. Common ways to get free shipping for clothes in Singapore:

• Zalora: free standard delivery on orders S$50 and above (after discounts/codes). (blog.Seedly.sg)
• Uniqlo: free Click & Collect (store pickup) with no minimum spend; home delivery may have a higher threshold (see site). (Uniqlo.com)
• Marketplaces (Lazada, Shopee): individual sellers and the platforms frequently run free‑shipping vouchers or sitewide free‑shipping promotions and seller vouchers during big campaigns — thresholds vary by seller and by promo. Check the Free Shipping / vouchers section during sales (9.9, 11.11, 12.12, etc.). (Lazada.sg)
• Cotton On (example of a retailer): free shipping promotions have run for orders over ~S$40 (promos vary; confirm on checkout). (Boncode.sg)

Quick practical tips to get free shipping

• Combine items or add a low‑cost accessory to reach the retailer’s minimum spend. (blog.Seedly.sg)
• Use Click & Collect / in‑store pickup where available (often free even for one item, e.g., Uniqlo). (Uniqlo.com)
• Save and apply platform/merchant free‑shipping vouchers (Shopee/Lazada vouchers) during big sale events. (brandradar.org)
• Join retailer memberships or apps — members sometimes get lower thresholds or free shipping offers. (Uniqlo.com)

If you want, I can check live/free‑shipping thresholds for 2–3 specific stores you'd use (Zalora, H&M, Uniqlo, Shopee, Lazada, ASOS, etc.) and list exact current minimums and any member deals. Which stores should I check?