Vortex Day Pack
Ideal for day excursions and sample collecting trips. Dimensions are 17.5×16.5.7”, 2125 cubic inches, weighs 20 oz. Special padded back with air cooling system, foam padded shoulder straps and waist and sternum straps. Constructed of ballistic pack nylon with reflective accents for better visibility.
NB photo is of only one type, different models are also available.