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eyewear

Glasses Hinge Types Explained: Barrel, Flex and Screwless

Barrel, flex and screwless glasses hinges differ in how they absorb stress and how they fail. What each type is, and which one fits your habits.

By Claire Donovan · Sep 29, 2026

The Rulebook index

What the label is required to say

Care labels

What the wash tub, iron and triangle are legally allowed to promise.

Fiber content

Percentages, grades and GSM — the numbers the tag must get right.

Sizing & fit labels

Why charts disagree across brands, and how to read them anyway.

Country of origin

The labeling rules that decide what 'made in' and 'gold-filled' may claim.

Picked from each section

Laundry care label tag close-up with symbols

Every Care Label Symbol, Decoded

The five care symbols and their variants, who owns them, what US law actually requires, and why the crossed-out drying symbol is the one that costs you money.

From our columns

The Rulebook

One standard or regulation at a time: what the rule says, what it governs, and what it can't reach.

Under the Lining

Construction anatomy — the shoulder, the sole, the hinge — ending in the one part to touch before you buy.

The latest

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