Sustainable Fashion: Why Buying Secondhand Matters
The fashion industry is one of the largest polluters on the planet. Buying secondhand reduces emissions, saves water, and keeps textiles out of landfills — while saving you money.
The environmental cost of new clothing
The textile industry accounts for roughly 8% of global greenhouse gas emissions — more than international aviation and maritime shipping combined. A single cotton t-shirt requires about 2,700 liters of water to produce, enough drinking water for one person for 2.5 years.
| Impact Area | Scale |
|---|---|
| CO2 emissions | ~1.2 billion tonnes/year |
| Water consumption | 79 trillion liters/year |
| Textile waste to landfill | 92 million tonnes/year |
| Microplastics released | 500,000 tonnes/year into oceans |
The average person owns 359 items of clothing, with roughly 25% sitting unworn in wardrobes. That unused clothing represents embedded carbon, water, and energy with zero utility.
What buying one secondhand item saves
Every secondhand purchase displaces a new item from the supply chain. The savings are measurable:
| Resource | Saved Per Garment |
|---|---|
| CO2 emissions | ~2.7 kg |
| Water | ~3,000 liters |
| Landfill waste | ~0.5 kg textile |
Replacing just 10 new purchases per year with secondhand alternatives saves roughly 27 kg of CO2 — equivalent to driving about 110 km in a petrol car.
The secondhand market is growing fast
Secondhand is no longer a niche. The global resale market hit $265 billion in 2024 and is projected to reach $350 billion by 2028, growing at a 12% compound annual rate. Fast fashion, by comparison, grows at about 4% annually.
| Stat | Figure |
|---|---|
| Global secondhand market (2024) | $265B |
| Projected market (2028) | $350B |
| Annual growth rate (CAGR) | 12% |
| Consumers planning to buy resale by 2026 | 60% |
| Gen Z searching secondhand first | 64% |
Platforms like Vinted, Depop, and ThredUp have made secondhand as convenient as buying new, removing friction that used to keep people away from resale.
How to build a secondhand wardrobe
Transitioning to secondhand shopping takes some adjustment, but the payoff is significant — both environmentally and financially.
- Audit what you own — Go through your wardrobe and identify gaps. The average person wears only 75% of their clothes regularly. Sell or donate the rest.
- Start with staples — Buy basics like jeans, coats, and knitwear secondhand. These items hold up well and offer the biggest savings over retail.
- Learn to spot quality — Check seams, zippers, fabric weight, and labels. Brands like COS, Arket, and Filippa K offer durability at mid-range prices and are widely available secondhand.
- Set saved searches — Most platforms (Vinted, eBay, Poshmark) let you save searches and get notifications when matching items are listed.
- Check before buying new — Before any purchase, search the item secondhand first. You'll often find the same piece at 50-80% off retail.
Where to shop secondhand online
Different platforms suit different needs. Here's where to start:
| Platform | Best For | Price Range |
|---|---|---|
| Vinted | Everyday brands, budget finds | $5-50 |
| Depop | Trendy, vintage, Gen Z styles | $10-100 |
| ThredUp | Large selection, curated quality | $8-80 |
| Poshmark | Premium and mid-range brands | $15-200 |
| The RealReal | Authenticated luxury and designer | $50-5,000+ |
| eBay | Everything, especially vintage | $5-500+ |
For more platform details, see our where to sell used clothes guide.
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Upload a photoFrequently asked questions
How much does buying secondhand help the environment?
Each secondhand garment purchased instead of new saves approximately 2.7 kg of CO2 emissions, 3,000 liters of water, and diverts textile waste from landfills. The fashion industry accounts for 8% of global greenhouse gas emissions — more than aviation and shipping combined. Buying 10 secondhand items per year instead of new saves roughly the same CO2 as skipping a short-haul flight.
Is secondhand clothing sustainable?
Yes. Secondhand clothing is one of the most sustainable consumer choices you can make. It extends the useful life of existing garments, reduces demand for new production (which requires water, energy, and chemicals), and keeps textiles out of landfills. The average garment is worn only 7 times before being discarded. Buying secondhand breaks that cycle by giving clothes a second or third life.
How big is the secondhand clothing market?
The global secondhand clothing market reached $265 billion in 2024 and is projected to hit $350 billion by 2028, growing at a 12% compound annual growth rate. For comparison, the fast fashion market grows at about 4% annually. 60% of consumers plan to buy resale by 2026, and 64% of Gen Z shoppers search secondhand platforms before buying new.
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