These ready-to-use combination/triple packaging mailing systems are tested and certified for transport of diagnostic specimens in conformance with IATA Packing Instruction 650, U.S. Postal Service and DOT regulations. Kits include leak-resistant foam shippers, absorbent material, water-resistant tape, leak-resistant press lock poly bag, corrugated shipping carton and instruction sheet. The absorbent material is sufficient to absorb complete contents of approved primary receptacles filled with blood.