Simply unzip the back, adjust the interior expansion mechanism to match your head size, put the mask on securely, zip it up, and activate the blinking eyelid feature naturally with chin movements.MATERIAL: Crafted from high-quality plastic combined with stretchy breathable fabric, this cosplay mask is lightweight, odorless, and comfortable to wear for extended periods without causing discomfort or suffocation risk.1:1 RESTORATION: Modeled directly after popular anime inspirations, the mask authentically replicates the hero concept at true scale, making it a wonderful choice for collectors, roleplay enthusiasts, and event gifting.VISUAL EYE: Designed with special visual eye panels that provide a broad field of view so you can walk, dance, and perform freely while still feeling like you have transformed into your heroic character.TIPS: Recommended for users over 7 years old. Always handle the zipper carefully, and when engaging the chin-controlled blinking mechanism, avoid applying too much force to prevent any controller malfunction.