I purchased this hair dryer attachment by #ProCIV as a temporary solution to dry my hair as I had rotator cuff surgery and it's hard for me to blow dry my hair one handed. That said, I can comb my hair through and place the one end onto the hose of my blow dryer, while putting the cap over my entire head. My hair dries well and I'm able to now wash and dry my hair without any assistance. This will also come in handy when i want to dry my entire head of hair quickly then brush it out.
At $13.99 this beats having to purchase a full hairdryer for a lot more money.