These are blue 5" x 3" (127x 76.2mm) electroluminescent (EL) panels from ELastoLite®. These EL panels are highly flexible, waterproof, and with a little bit of assembly can be easily be applied to most articles of clothing.
ELastoLite® is a waterproof electroluminescent lamp line that allows you to apply light to any article of clothing or project. Thanks to a 3-dimensional, elastomeric, membranous polymer thick film, this EL line can be applied to almost any surface with no loss to flexibility and movement.
Note: Make sure you check out the Hookup Guide below for ELastoLite® tips and instructions.