This is a late reply but I would like to say that even though the Storch's fabric quality is amazing and that it is very supportive, I sold my Ulli Storch after a couple of weeks...
At first I loved the Storch was, but after one week I was finding myself avoiding it - I found that the fabric was heavy and not as easy to tie.
I have since tried a Indio Red Didy and an Ellaroo and I like these much better. I love the Didy's fabric feel, beauty and comfort and I love the Ellaroo too - it is GORGEOUS and it just has the perfect coolness during hot summer days!!