More information on TEXAID can be found here.

TEXAID is a working community organised around six charities which aims to collect old clothes throughout Switzerland with a view to reusing the textiles.
BLACKSOCKS has been working together with TEXAID for a few years. Together with our customers, we are making a contribution towards saving the environment and providing aid in developing countries: you regularly clear out your sock drawers and send the worn out socks to TEXAID. We can provide the incentive by paying the postage costs for you.
The sockscription means our customers are regularly sent new socks.
They unpack them and put them in their drawers. To make sure the drawer doesn't overflow with socks, we send sockscription holders a pre-printed label addressed to TEXAID together with their new socks. All they need to do is fill up the box their socks came in with the socks they no longer need, stick the label on it and put it in the nearest post box. They don't even need to pay the postage; we at BLACKSOCKS take care of that.
More information on TEXAID can be found here.
Don’t you have enough socks in your drawer?