Can you sew patches on spandex?
Iron-on backing is not suitable for these materials because the heat could cause damage to the attire. The best emblem backing for polyester, nylon and spandex is a sew-on backing, adhesive backing or Velcro backing. These backings will adhere to your sensitive material perfectly!
What is the best material for making patches?
The best and most common base fabric for patches is felt or twill, but any sturdy fabric with work when paired with a quality fusible thermal stabilizer. Commercial patches are made on specialty machines. To make patches similarly at home, a satin stitch edge finish design is needed.