175 Pre-Filled 4" x 8" Green Eco Friendly Cushioning Air Pillows from AirSaver Pack Preferred packaging by todays consumers. 1.2 mil thick, made of Low Density Polyethylene materials, making it flexible and durable Reusable and stays inflated for long period of time unless punctured. Can use for void-fill, Cushioning, blocking and bracing. Recyclable