Don't know if this particular product has been introduced here yet...my apologies if this is repetitive information...but I ran across it while investigating locking tie-down straps for windsurfing equipment and thought there may be some interest. Specifics for spa application can be found
here. I'm certainly not impressed with the picture of their spa cover which looks as if the straps were installed too tightly. I'm sure the straps could be properly installed to not cause such deformity. Anyway, maybe some will have the need for such especially those who leave their spas unattended for periods of time (rentals or vacation homes?). Enjoy... 8-)