The best big pack is the Berghaus Vulcan. It's 100 litres capacity, that's HUGE! The SAS threw a full one out of a Hercules at about 10000 feet to see what happened. It survived the fall! The Karrimor Sabre 30 (aka Hot 30) is a small pack but just as tough, perfect for day walking..

To be blunt nothing else will do the job like these do..

JYD #3 Poor, but still dreaming of a sage and black SOD CG...