As in wool baselayers, or the synthetic ones?
I've only ever washed my wool at 30 on a normal cycle, and nothing has died. But I don't know why you'd even want to wash at 40 (or 50?!)
@branwen started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
As in wool baselayers, or the synthetic ones?
I've only ever washed my wool at 30 on a normal cycle, and nothing has died. But I don't know why you'd even want to wash at 40 (or 50?!)