Based on this product's specifications, here are some alternatives and similar models
Backpack Gregory Nano Urban 18L daypack, 18 L, Black, polyester, 480 g, waist belt
Summary description:
Compact daypack Gregory Nano Urban 18L designed for hiking and everyday use. Made of polyester, volume 18 L, dimensions 510×270×200 mm and weight 480 g. Features a waist belt, two exterior side pockets, and 9 kg max load. Practical for day trips, commuting or light outdoor activities; check seams and straps regularly for durability.