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Long-form analysis of how a category really works.
31 articles
SPF 50 is tested at 2 mg per square centimeter. Studies of real use repeatedly find people apply a quarter to a half of that — and protection falls at least as fast as the amount does.
The membrane almost never fails. What fails is the treatment on the outer fabric, and once that goes the jacket stops breathing and your own sweat condenses inside it.
The number on the box is measured at 3.7 volts inside the pack. Your phone charges at 5 volts or more. That conversion, plus heat, eats about a third of the capacity before you see any of it.
Spend on the brewer and you refine the details. Spend on the grinder and you change what is possible — because inconsistent grounds cannot be brewed evenly by anything.
No non-stick coating is permanent, at any price. Once you accept that the pan is a consumable with a two-to-five year life, the buying decision changes completely.
The part of a running shoe that does the work is invisible, and it fails long before anything you can see. Which is why most people run for months in shoes that stopped working.
The battery in every pair of wireless earbuds is consumable, sealed and unreplaceable. Once you price that in, the expensive pairs stop looking like the safe choice.
