Bags particularly strong and thick (160 ?m), made of multilayer polymer materials (PET12/NY14/LDPE120). They are certified as secondary packaging for the transport and shipment of Category B biological substances (UN3373) by land, sea and air in accordance with packing instructions P650 (ADR, RID, ADN, IMDG) and PI650 (ICAO-TI or IATA). The bags ensure a perfect seal, certified for a pressure differential of 95 kPa in the temperature range from -40°C to +55°C. Equipped with a tamper-evident closure system with permanent adhesive and a second pocket for accompanying documents (except cod. 10597). Usage instructions and the Biohazard risk symbol are printed on each bag.