The Ten Essentials first appeared in print in the third edition of "" (January 1974). Many regional organizations and authors recommend that hikers, backpackers, and climbers rigorously ensure they have the ten essentials with them. However, personal preferences and differences in conditions may dictate otherwise and with experience most adventurers add and subtract from the list depending on the situation. Some ultralight backpackers do not always carry all of the items and believe it is an acceptable risk they take in order to travel light and fast.