Lab Bags are made from durable, moisture and leak resistant co-extruded polyethylene. Open-end or open-side constructed bags with a special leak-resistant and tamper-evident self-seal adhesive closure system. Burst resistant side pouch seals are also a special feature. Designed as an overwrap or secondary packaging for any shipments that require containment from possible leakage of primary packaging. A common use is for the transport via courier of bodily fluids for testing in centralized laboratories.