That is to avoid any skin irritations that be caused by the wrong fabric conditioner. (babyishcare.com)
The layers closest to your skin, like thermal underwear and leggings, can leave you feeling itchy and constricted all day long if they're made with the wrong fabrics, says Dr. Katta. (health.com)
Either it's a great style but wrong fabric or visa versa. (unefemme.net)