A perfect backpack for your hike! One of the materials used to make this bag is synthetic material and it has a practical inner pocket for smaller items.
From Amazon
Fjallraven 27097-660 Kajka 100 Sports backpack Unisex Adult Forest Green Size One Size
Cotswold Outdoor
Kajka 100 Rucksack
The Bushcraft Store
Fjallraven Kajka 100 Rucksack - Forest Green