Good housekeeping is not my usual area of MN but I'm hoping someone here can assist. DPs mum insists that he takes his work trousers over to her house to wash them as she has a special washbag for them to go in. It would be so much easier if we could just buy one of these bags and wash the bloody trousers at home. But she won't tell us what we need to get, like it's a big special secret.
Any idea what this washbag thing might be?