Uniseason Waterproof nylon Oxford bag 39 to 64 L expandable 3 days military tactical day backpack different colors available Main fabric: 100% nylon oxford with PVC coating Made in USA or Imported Capacity: 39 to 64 L expandable 3 days,Constructed of 600 denier polyester with PVC backing,waterproof Bag size: 20.5"X15"X7.65"-12.25" (expandable)External Molle loops allow additional pockets to be attached if necessary The bag with 3 compartment for different function,easy grip zipper pullers,back support belt, Constructed of 600 denier polyester with PVC backingExternal Molle loops allow additional pockets to be attached if necessaryExtra-large, expandable main packing compartment.The bag with 3 compartment for different functionAn organizer pocket has several mesh compartments built in for accessory storageEasy grip zipper pullsBack support beltPadded back, shoulder with sternums strap for comfortable usage Carry-and-drag plastic handle,wide tape and comfortable design on the back part,