Reference

Glossary

Plain-English definitions of the terminology used in mens leather goods, crystal glassware, RFID blocking, watches, and leather care. The terms that come up in our buying guides — explained once, properly.

Leather

Full-grain leather

The highest grade of leather. Uses the entire hide with the natural grain intact, including any imperfections. Most durable and develops the richest patina over time. Found on premium wash bags, briefcases, wallets. The standard to look for in luxury leather goods.

Top-grain leather

Slightly sanded leather where surface imperfections have been buffed off. One tier below full-grain. More uniform appearance, still genuine leather, still develops patina. Common in laptop bags and briefcases at mid-tier price points.

Genuine leather

A misleading marketing term. The lowest grade of leather — typically the inner splits of a hide that have been treated to look like full-grain. Less durable, prone to peeling and cracking. Avoid for items expected to last more than 1-2 years.

Bonded leather

Leather scrap and dust glued to a fabric backing with a polyurethane coating. Not genuine leather. Cracks and peels within months of regular use. Avoid entirely.

PU leather

Polyurethane-based synthetic material designed to mimic leather. Fully vegan, more flexible than genuine leather at the same thickness. Practical for items with hinges or fold mechanisms (valet trays, watch rolls). Wears differently — uniform appearance over time, no patina.

Vegetable tanning

A traditional tanning method using plant-based tannins from chestnut, oak, or mimosa bark. Slow process (weeks to months) producing leather with depth of colour and the ability to develop rich patina. Italian Tuscan leather is the best-known example.

Chrome tanning

Modern tanning method using chromium salts. Faster (hours rather than weeks), produces softer leather, allows wider colour range. Doesnt develop patina the way vegetable-tanned leather does. Most mass-market leather is chrome-tanned.

Oak bark tanning

The slowest tanning process in the world — hides layered with ground oak bark and left for up to 14 months. Produces leather of extraordinary density and resilience. Practiced by only a few English tanneries (Sedgwick, Thomas Ware). Premium pricing reflects time investment.

Aniline finish

A leather finish where the dye penetrates the hide rather than sitting on the surface. Means the leather patinas richly with use rather than scuffing back to pale leather. Standard on premium full-grain.

Bridle leather

Heavily oil-and-wax conditioned vegetable-tanned leather, originally developed for horse tack. Particularly water-resistant; ages to a deep glossy patina. English bridle leather (Sedgwick, Thomas Ware) is the gold standard for premium briefcases and belts.

Patina

The gradual change in colour, texture, and sheen that occurs as leather absorbs hand oils, sunlight, and general wear. One of the great pleasures of owning quality leather — your item becomes uniquely yours. Italian leather patinas quickly; English leather patinas slowly but more dramatically.

Stitching

Saddle stitch

A hand-finished stitching technique using two needles and a single thread. Each stitch is independent — if one breaks, the rest hold. Almost exclusive to high-end leather goods. Recognisable by the slightly diagonal angle of each stitch.

Lockstitch

Machine-sewn stitch using a single thread looped through both sides. Faster and cheaper than saddle stitch, but if one stitch fails the whole seam can unravel. Standard on mass-market and mid-tier leather goods.

SPI

Stitches Per Inch. A measure of stitching density. Mass-market: 5-7 SPI. Mid-tier: 8-10 SPI. Luxury: 10-14 SPI. Higher SPI means more thread, stronger seam, and more time on the maker bench.

Waxed linen thread

The thread used by quality leather makers for hand-stitching. Made of linen fibres coated in beeswax. Ages with the leather, gets stronger over time, and patinas to match. Polyester thread by contrast stays uniformly new while the leather around it patinas.

RFID

RFID blocking

Wallet or holder construction that prevents radio frequency reading of contactless cards inside. Typically achieved through a metallic lining (aluminium, copper) or solid metal shell that creates a Faraday cage around the cards.

Faraday cage

A closed conductive surface that blocks electromagnetic fields from passing through. The basis for RFID-blocking wallets — the metal lining or shell stops radio waves from reaching the contactless cards inside.

ISO/IEC 14443

The international standard for proximity cards used in contactless payment. Operates at 13.56 MHz. UK debit and credit cards, biometric passports, Oyster cards, hotel keycards, and most office building access passes all use this standard. RFID-blocking wallets are tested against this frequency.

13.56 MHz contactless

The radio frequency used by ISO/IEC 14443 contactless cards (UK debit/credit, biometric passports, transport cards). Skimmable from up to 10cm by inexpensive readers. RFID-blocking products are tested at this frequency.

Crystal & Glass

Lead-free crystal

Modern crystal made with potassium oxide instead of traditional lead oxide. Same brilliance and refractive quality but safe for daily drinking use. Particularly important for acidic spirits and wines that can leach lead from traditional crystal over sustained contact.

Hand-blown glass

Glass formed individually by a glassblower while molten. Identifiable by slight variations in stem thickness and bowl-to-stem transition. Machine-pressed glasses are perfectly uniform with a visible mould seam line. Hand-blown costs more but ages better and looks more refined.

Bordeaux glass

Wine glass with a taller, narrower bowl profile. Designed for full-bodied reds (Cabernet, Bordeaux blends, Malbec, Shiraz). Directs wine to the back of the palate, emphasising tannin and structure. The workhorse profile most home wine drinkers should have.

Burgundy glass

Wine glass with a wider, rounder bowl profile. Designed for delicate reds (Pinot Noir, Gamay, Nebbiolo). Wider opening releases aromatics — emphasises nose over palate. The specialist profile for serious wine drinkers who collect Burgundies.

Tulip flute

Champagne glass with a slightly narrower mouth than a standard flute. Combines the bubble-preservation of a flute with enough opening to release aromatics. The modern sommelier preference over both the standard flute (mutes aroma) and the coupe (loses bubbles).

Materials

18/10 stainless steel

Stainless steel with 18% chromium and 10% nickel. The standard grade for premium cutlery and kitchenware. Fully dishwasher-safe; will not tarnish or rust under normal use. Compare to 18/0 (no nickel) which rusts at the tang within months.

316L stainless steel

Marine-grade stainless steel. Same grade used in luxury watch cases (and surgical implants). Won't tarnish, hypoallergenic, won't show fingerprints the way plated metals do. Standard on premium watch cases and bracelets.

18/8 stainless steel

Food-grade stainless steel with 18% chromium and 8% nickel. Standard grade for spirit decanters, drink dispensers, and cocktail shakers. Doesnt leach metallic taste into spirits or food even with sustained contact.

Watches

Quartz movement

Battery-powered watch movement using a vibrating quartz crystal for timing. Accurate to ±15 seconds per month (vs ±10-30 seconds per day for mechanical). Battery life 2-3 years; replacement at any watch shop. Reliable, cheap to maintain, accurate.

Butterfly clasp

A bracelet clasp that opens like a butterfly's wings — both sides hinge open and the bracelet drops away. No pin to push through holes. Faster to put on, more comfortable, visually cleaner than a buckle. Standard on mid-range and luxury watch bracelets.

Sapphire crystal

Synthetic sapphire used as a watch face material. Dramatically harder than mineral crystal — virtually scratch-proof. Found on premium watches (£150+). Compare to mineral crystal (hardened glass) used on mid-tier watches.

Care

Saphir Renovateur

A premium leather conditioner from French manufacturer Saphir Médaille d'Or. The gold standard for full-grain leather conditioning. Applied every 3-6 months with a soft cloth. Used by premium shoe and bag makers.

Collonil Waterstop

A premium leather waterproofing wax. Applied every 12 months for weather resistance on full-grain leather bags and shoes. Particularly relevant for laptop bags worn through commute weather.

Leather conditioning

The practice of applying neutral leather conditioner every 3-6 months to maintain leather suppleness and prevent cracking. Applied with a soft cloth, worked in evenly. Should be done after wiping the leather clean. Doubles the lifespan of full-grain leather.

Where these terms come up

Our editorial guides reference this terminology throughout. Start here: