This waterproof bag is made of hard-shell material. It has mesh and zipper pockets inside and can be easily attached with a belt. - Type: Side bag - Material: Hard shell - Internal structure: Mesh pocket, zipper pocket - Attachment method: Belt type Approximate size is 25 x 12 x 7 cm. The third image shows the mounting example, attached to the front bumper of an R1200GS. I kept this item unused because I used the other side for a drink holder. It was the perfect size for a puncture repair kit and an electric pump. Thank you for looking.