If you're going hiking, this is a suitable backpack. The material of choice for this bag is nylon and you can put various small items in the inner pocket.
From Amazon
Osprey Europe Stratos 24 Men's Hiking Backpack Poinsettia Red O/S
Trekkinn
Osprey Stratos 24l Backpack Red
Tredz Limited
Osprey Stratos 24 Mens Hiking Backpack - Poinsettia Red