The quality and design of most back protectors seem to be well above average. Unfortunately I can't use them on my Tesla car as all Teslas have fixed non-adjustable seat headrests. They are designed to fit under the headrest and velcro around the stainless steel posts of most car seats. You really should state it in the product description. Any vehicle with built-in non-adjustable headrests will most likely not be able to use these.