Thanks to A4 paper size compatibility and a laptop pocket, the updated Velocity is a practical bag indeed. Its roll closure makes for reliable and waterproof action as well as helping keep the pack light in weight. This High Visibility special version reflects light in a pretty intense way, making it comparable to a reflective vest. As the demo pictures show, the yellow version is the best choice for ultimate safety while the black one reflects with more day-time style. - Back panel complete with padding enabling airflow - Detachable waist strap and chest strap - Bottom has reinforcements at corners - Updated: inside pocket for computer, measurements 36 x 24.5 x 2.5 cm - Lift handle - Latch point for LED light or helmet (the light needs to have an attachment clip) - Welded seams - Material 1: PD620, PVC coated polyester fabric - Material 2: PS620C, PVC coated Cordura fabric - IP64 rated: dustproof, withstands water spray from all directions - Roll closure - 5 year guarant