the pants have survived in spite of the required by the manufacturer 30 degree washing and drying on the line, the first wash without prejudice at 60 degrees and tumble drying. How long do they join the remains to be seen. One star deduction is for these care instructions of the manufacturer. I find that underwear should always be made for 60-degree wash and drying machines, for reasons of hygiene and because not everyone has space for drying on the clothesline.