The Pelican Case’s molded high-density foam provide total protection from the rigors of impact, vibration, and shock. ZOLL AED Plus Hard Sided Carry Case is made of high-impact structural copolymer that is extremely strong and durable. With its exclusive 0.25" (6.4 mm) neoprene O-ring, and ABS latches, this case seals perfectly. The Pelican Case also includes an automatic purge valve for quick equalization after changes in atmospheric pressure.