Save $15 on a 100-pack of Atrix VACBP6-100P replacement HEPA filters for backpack vacuums, now $221.56 on Amazon.

Baldwin oil filters has been around forever, but the brand is slept on because it's not usually stocked at auto parts stores.

Fish have been quietly perfecting a way to sift tiny particles from water for millions of years, and engineers are finally catching up. A new generation of fish-inspired filters now promises to strip ...