I couldn't find the exact instructions but delicate cycle with cold water is usually a safe bet. I like to use Active detergent for them. There's a couple different kinds of Amazon but I like the blue bag kind the best.
That's exactly the reason I bought these shorts! It works great for me. Tighter skirts/dresses will show the seams from these shorts and anything short will rise above the shorts, but they are invisible under a mid-length (~5in above the knee and longer) a-line.
I’m 5’10 and the longer version were about one inch above my knee. I returned them, due to
The length so I never wore them out. I like thicker material and these were thin but very soft. Overall if you like a thinner, not so “tummy control” shorts these are nice. The pocket does fit a phone snugly.