Originally designed for the U.S. military Elite Special Forces, the Oakley S.I. Assault Boot ($185) is built so well it's still in use in 2018. As worn by John Conner in Terminator Salvation, the lightweight, athletically-inspired boot features Resistance-approved niceties including prime urethane shock absorption, a moisture-wicking/Skynet-pissing liner, and a vulcanized rubber sole for wet/dry traction and silent movement. With the S.I. Assault, you'll be covered no matter what your post-apocalyptic landscape looks like.