Reclosable Color Grip Snap Enclosure An audible track lets you hear and feel the bag close PVC & Plasticizer Free Made in the USA Kosher As environmentally friendly as plastic can be. Natural Value Color Grip slider bags feature Double Zippers with Colored Grips that feature an audible track that lets you hear and feel the bag close. Color added to the short flange for easier identification of contents while gripper ridges added to the outside of the flanges make for easier handling and opening.