SATINA High Waisted Super Soft Capri Leggings - 20 Colors - Reg & Plus Size

It says to hand wash and hang dry. Can I machine wash and dry?

Do they ride down in the back?

I’m 5’2” and weigh 140 lbs, what size should fit?

There is no option to choose s m l. how can the "one size" fit each size?? how tight are the pants in the calves area? how hard to get on/off?