The LokSak 2-Piece Kit of aLokSak 16" x 24" (41 x 61 cm) is a re-sealable element-proof storage bag featuring a hermetic seal. That means absolutely no water, air, dust or humidity permeates the closure. It is designed for a wide range of applications and environments. The transparent bag is flexible and puncture resistant. The unique and patented materials, closure systems and manufacturing techniques used to fabricate the aLokSak meet the most rigorous testing standards.