We are not really in to advertising products but this is a solution that may come in usefull. Originally highlighted to us early this year by Jo Turville with respect to sitting volleyball, I came across another use for it at Okehampton last week.
Product Description
1″ velcro net straps that provide additional tension to help secure the volleyball net to the standards. Includes 6 tension straps with buckle for secure fit.
Item Length: 8 Item Height: 6 Item Width: 6