i carry speare cash in mine (money)belt, just in case. i don't have a problem with what kind of backpack we are allowed too carry. i don't put too much preparness stuff in to mine packpack, some days in the week mine backpack can weight over 10 KG ! <img src="images/graemlins/mad.gif" alt="" /> those books are to freaking heavy ! i have to squeze them in mine 25Liter backpack twice every week. On otherday it's lighter fortunaty.