Size:43*25*15CM 
 Volume:18L
 Fabric:420D/PU 2MM ripstop nylon+420D/PU double-line ripstop
 Description:                                                                                                                                                                                                                                                                                      Hydro system to keep 2L water bladder
 Light weight and firm water-proof fabric
 Adjustable fastening system for helmet 
 Reflective webbing at the bottom to fix torch
 High effective airflow back system
 Front zipper pocket to keep some small essentials