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Ultralight backpacking
Ultralight backpacking is a style of backpacking that emphasizes carrying the lightest and simplest kit safely possible for a given trip. ''Base pack weight'' (the weight of a backpack plus the gear inside & outside it, excluding consumables such as food, water, and fuel, which vary depending on the duration and style of trip) is reduced as much as safely possible, though reduction of the weight of consumables is also applied.
Light and ultralight are generally defined as base pack weights below and respectively in the US; elsewhere the definitions are commonly given as lightweight being under 10 kg, and ultralight under 5 kg. For comparison, traditional backpacking practices often results in base pack weights above , and sometimes up to .
== History ==
Ultralight backpacking was popularized by rock climber Ray Jardine, whose 1992 book ''PCT Hiker's Handbook'', later retitled as ''Beyond Backpacking'' in 1999, laid the foundations for many techniques that ultralight backpackers use today. Jardine claimed his first Pacific Crest Trail thru-hike was with a base pack weight of , and by his third PCT thru-hike it was below .〔
An early pioneer was Grandma Gatewood, who thru-hiked the Appalachian Trail in 1955 with only a duffel bag containing an army blanket, a plastic sheet, an umbrella, and other very simple gear much lighter than the heavy equipment common among ''thru-hikers'' in those days.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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