More or less useless. 1-2 sheets? No way.
I washed 1 pair of underwear, 2 lightweight sports bras, 2 pair of ankle socks and a lightweight cotton t-shirt in my hotel sink. I used SIX of these sheets and they barely made bubbles.  Worse, when these things all dried my clothes all smelled the same as they did before washing them. There was no scent of detergent. These did not get my clothes clean.  I guess I’ll be using hotel room soap or having my clothes laundered midway through my trip.
Rating: 1 stars