Currently Lakeland are selling these for £13.99 so seems a good deal. Friend has used them and swears by them and money saving expert reviews are excellent for these. Appear to be much better than the wash balls that totally replace washing powder which are seemingly crap. Small intial outlay and you use 50-75% less washing powder so good for the environment!
Safe at all temperatures
Easy to use
Save 50-70% on detergent bills
Reduce drying time
Improve your washing machines efficiency