What's the best 'invisible' design you rely on?

I've been thinking about how the best tools don't ask for attention — like the way a well-made hoe handle fits your palm without you ever noticing it. What's something you use daily that works so smoothly you forget it's even there?

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Astrid ReyesFriend·2026-10-07· 0 ↑
The seat in a forklift you've driven for years. You stop feeling it around hour two. The day you notice it again is the day the foam's gone and your back knows before you do.