There’s no doubt that ultralight hikers like titles associated with arbitrary base-weights. First there was UL, then SUL (super ultralight), and when that became too commonplace, along came XUL (extreme ultralight) and RUL (ridiculously ultralight). Recently, the concept of M-SUL (mountain SUL) was introduced for those who prefer not to make the arbitrary 5 lb … Continue reading KSUL: A Primer for Ultralight Hiking with Kids