MOUNTAINTOP 55L/65L Internal Frame Backpack Hiking Backpack with Rain Cover-5822III YKK Zipper:YKK brand zippers open and close smoothly with each pull. YKK Buckle:These high quality buckles clip together easily,buckle up and release quickly when needed. -WARRANTY- Includes 90 days limited warranty. Washing Instruction:Water-resistant coating fabric. Please don't wash with liquid detergent or bleach. Note:Please feel free to leave us a message if you have any questions.