I saw this sweater in a charity shop sale for £2 and thought it was a lovely material, so I decided to make it into a bag, and sketched out a design. It is 100% acrylic, and I wasn't even going to attempt felting it, but I wanted to stop it stretching badly.  My solution was to back each piece with cotton sheeting.  I added iron on interfacing to the sheeting and used my overlocker to join them,…