I've been using these a while and find them very handy, but the other day I didn't have much washing so threw a mixed wash in with 3 shout sheets(2 had been pre-used), I hadn't realised there was a red pair of shorts in the mix which had really run, the sheets had saved all the washing, but my brand new bra, which is now a dinghy pink, typical isn't it. I'll keep using them for mixed colours, but won't chance whites in the mix again.