These flexible rubber hollow cords are perfect for trying on your knitting without removing any of it from your needles!
The end of the cord squishes firmly over most size needles (I even managed to wedge it onto my size US 15 needle tips!). After it is attached to your needle tip, simply slide stitches on to the flexible tubing so you can try your sweater on. When you are done, push all of the stitches back onto the needle and pull off the tubing.
Packs are either a Sweater Pack (3 cords: two in 1 meter length, and one in 2.5 meters length) or Meter Pack (4 cords all in 1 meter lengths) all in a secure screw top circular tin.