EmbTao Glow In Dark Medic Spartan Morale Tactical Embroidered Applique Iron On/Sew On Patch Glows in the Dark after absorbing the light. Very Cool! EmbTao is the first brand of developing Embroidered Glow In Dark Patch. Measures 2.5 inches wide by 2.5 inches tall. Heat seal backing. Iron on or Sew to any garment. Ironed-on patches will not come off. Safe & non-toxic. Washable and Durability. DIY in 16 seconds! Perfect for Jeans, Jackets, Vests, Hats, Backpacks and more!