Navigator and aviator sunglasses are close cousins in thin metal, and the difference sits in the top line of the lens. An aviator has a teardrop lens that dips low toward the cheek, while a navigator flattens that top edge into a straighter brow bar with a squarer lens, so it reads sharper and more graphic on the face. For a navigator with a softer, feminine finish, start with Zimmermann and then browse the wider edit of designer sunglasses for women.

Jimmy Choo uses Italian sizing, the same as EU. Here is the full EU, UK and US chart, how to handle half sizes and what the number in each style name means.

Suede bags need a little more care than smooth leather, but a protected, brushed suede bag lasts for years. Here is how to choose one and look after it.

St. Agni uses Australian sizing, which matches UK sizing. Here are the brand's conversion charts plus fit notes by style for clothing and shoes.

Versace uses Italian sizing, so an IT 38 is a UK 6 and a US 2. Here are the clothing, shoe, ring, belt and swim charts, with fit notes.

Moncler men's outerwear uses numbers from 00 to 8, while its knitwear uses letters. This chart converts every size and explains how Moncler's fit labels affect your choice.

Every Moncler made since Spring/Summer 2016 carries a code, a QR code and an NFC tag. These eight checks show how to verify a Moncler jacket before you buy.

A genuine Mackage coat is easiest to confirm from the inside: the composition label, the small P.O. number tag and the seller tell you more than the logo.

RECCO is a passive reflector built into skiwear that professional rescuers can detect through snow. Here is how it works, what it does not do, and which Coveti pieces carry it.

What the 10K and 20K on a ski label actually mean, how breathability and fill power fit in, and a map of Perfect Moment's jackets and pants by rating.