When you drop off your unwanted textiles (in any condition from any brand) — like old tees or dresses, underwear, old socks, stockings, ripped tights, even old towels and sheets — in a H&M store (just ask for the garment-collecting box, often located next to the cash desks), you’ll get rewarded with a voucher. Must donate at least one bag of clothing for the voucher of a 15% discount. 3 bag limit per person.