http://www.drumsandpercussioncentre.co.uk/cymbal-cases/le-blond-20-fusion-drum-case-set-with-free-cymbal-case?gclid=EAIaIQobChMItcvGuOKs4gIVw-FRCh3JTgjHEAQYBSABEgJr0vD_BwE
They are made from polypropelene. I had a box for leads made 18 years ago. It is bombproof. It is light and will take a beating.