*Waterproof zipper
*Isolates air and water
*Can be used as a life-saving bag
An airtight bag (or hermetic bag) is a sealed packaging designed to prevent air, moisture, dust, or microorganisms from entering, thereby protecting contents from environmental factors. Utilizing sealing mechanisms (e.g., zippers, heat-seal strips, or adhesive strips) and multi-layer composite materials (e.g., aluminum foil, polyethylene), it effectively blocks oxygen and humidity. This extends shelf life (e.g., coffee, dried foods), prevents corrosion (e.g., electronic components), or maintains sterility (e.g., medical tools). Common applications include food preservation, moisture-sensitive electronics storage, medical supplies, and waterproof outdoor gear packaging.
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