A more protective sequel to last year’s DualTek Extreme Shock Case + Shield, PureGear’s new DualTek XT Extreme Terrain for iPhone 5/5s ($50) is weatherproof and military drop-tested. The two-piece case includes a front panel with a built-in screen protector, including Touch ID-compatible Home Button coverage, and a rubber and plastic rear. Together, they form an airtight seal. Each of the buttons and ports is covered, with a flip-open protector…