Clothes · Eco-Tech Hackathon · POWERFEM

ReWear

The most sustainable wardrobe is the one already hanging in your closet.

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The gap

Full wardrobes, and we keep buying new.

There is no easy, social, local way to give barely-worn clothes a second life, and no feedback showing what a swap actually saves. So garments sit unworn while fast fashion keeps producing.

The scaleThe average EU citizen discards roughly 11 to 12 kg of textiles a year; under 1% of clothing is recycled into new garments.

The costOne cotton T-shirt consumes on the order of 2,700 litres of water to produce.

Who hurtsYoung people 16 to 30 are fast fashion's core demographic, which makes them exactly the group that can flip it.

The solution

Swapping, made easier than shopping.

A digital wardrobe plus a local swap network. Garments stop being clutter and start being currency, with the environmental savings counted out loud.

01Catalogue what you don't wear. Type, material, size, condition; each item shows the footprint it carries.
02Wishes meet offers. "Maria wants a denim jacket, size M. Elena listed one, 1.2 km away."
03Matches become swap parties. The app bundles matched pairs into events at youth centres: a place, a date, a reason to come.
04Every swap counts. Water and CO2 kept in use accumulate on a visible impact counter.

Your wardrobe · 7 items listed

Denim jacket

Size M · good condition · listed 2 days ago

keeps 3,800 L of water in use

New match Elena wants a denim jacket (M) · 1.2 km away Next swap party: Sat 17:00, Larnaca Youth Centre

11,400 Lwater kept in use 23 kgCO2e avoided 9swaps completed

The one-day build

A lookup table, a filter, and a good story.

The footprint math ships as a built-in table (about 10 garment types by 4 materials); matching is a simple filter over mock listings. Builders seed it live with their own wardrobes during the demo.

✓"Add garment" form with type, material, size, condition dropdowns.
✓Item cards showing the water and CO2 each swap keeps in use.
✓Wishlist-to-offer matching over a mock swap feed.
✓Running impact counter across all completed swaps.

The 3-minute pitch

Hook: hold up a T-shirt. "This cost the planet 2,700 litres of water."
Add three garments live, wishlist a denim jacket, and land a match with a mock user.
Confirm the swap: the impact counter jumps. Close with the swap-party screen and what one school running this monthly would save.

Why it wins

Judges' scorecard.

Feasibility	Forms, a lookup table, and filter matching; the lowest-risk build with the most personal demo.
Impact	Attacks textile waste and its water footprint at the demographic that drives fast fashion.
User-friendliness	A familiar marketplace mental model; the impact numbers make the "why" instant.

SDG 12 SDG 6 SDG 13 Software only No hardware No external data

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