bubble wrap; air-cushioning material
Refers to plastic sheeting with air-filled bubbles used for packaging and cushioning. Often called プチプチ in casual speech.
I wrapped the fragile item in bubble wrap and shipped it.
Casual, onomatopoeic name for bubble wrap, commonly used in everyday conversation. 気泡緩衝材 is the formal, technical term.
Compound of 気泡 (bubble), 緩衝 (cushioning, shock absorption), and 材 (material). A modern technical term.