The Patagonia Atom Sling 8L Pack in Black is exactly what you've been looking for, a cross body bag with all the features and specs of a technical backpack all compressed into a great sized teardrop shaped pack. The bag is coated with a polyurethane and a DWR finish and features an asymmetrical harness, soft and breathable mesh on the back panel and harness for ventilation, a padded tablet sleeve, a large and expandable phone compartment, exterior compression that could hold a spare jacket and finished with a 100% Nylon fabric which is 50% recycled.