50L Parameters:
Bag Capacity: 50L
Backpack Size:50*23*36 cm
Weight:about 0.85kg
60L Parameters:
Material: waterproof polyester
Bag Capacity: 60L
Backpack Size:68*33*20 cm
Weight:about 1.1kg
Features:Waterproof , Durable, Comfort,With Rain Cover, Thickened Pad on the back