Personally I would try Wonderflex to play with first unless there's a specific reason you need Worbla or if budget is just not an issue. I'm saying this because Wonderflex can be bought for srsly half the price of Worbla ($40 vs $80 for big sheet) which can make a big difference.
I'd just read about them and the advantages and disadvantages.
Disclaimer : This post written by a Grumpy Old Man
Actually in the pipes:
- Remaking Ser Loras doublet.
- Luke Skywalker, A New Hope
- Wind Waker starter costume in swim material
Eventually: Paul from Dune, Faramir, Harry Sullivan