Khufu Sil,LOCUS GEAR Khufu Sil Review - Hiking in Finland,Solid Inner The solid (breathable nylon) inner has half or all of the wall surface made of solid (breathable nylon) fabric. This inner is available for models such as Khufu, Hapi, Khafra,,LOCUS GEAR Khufu Sil Review - Hiking in Finland,Khufu HB - 宗像山道具店 by GRIPS