Key takeaways

• PBT resists shine because it is harder and less prone to being polished by skin oils; ABS polishes quickly.
• Thickness matters as much as material — a 1.5 mm PBT cap sounds deeper than a 1.0 mm one.
• Doubleshot legends never wear off; dye-sublimation is permanent but cannot print light on dark; pad printing wears away.
• ABS is the better choice when you want RGB shining through the legends.
• Profile changes typing feel more than material does. Switching from OEM to a uniform profile changes your hand position.

What is the difference between PBT and ABS?

ABS (acrylonitrile butadiene styrene) and PBT (polybutylene terephthalate) are the two plastics used for almost all keycaps. ABS is softer, easier to mould precisely, and takes vivid pigment well. PBT is harder, has a higher melting point, and has a naturally slightly grainy surface.

The practical consequence is wear. Skin oils gradually polish the softer ABS surface, producing the glossy patches you see on well-used WASD and spacebar keys. PBT resists this for far longer — it does eventually shine, but typically after years rather than months.

PBT vs ABS compared

Some sets combine both, using PBT for the body and a polycarbonate or ABS layer for the legend so RGB can pass through while the touched surface stays shine-resistant.

How keycap legends are made

Doubleshot moulds two layers of plastic together, so the legend is a physically separate piece running through the cap. It cannot wear off, and it supports shine-through. It is the most durable method and the most common on quality sets.

Dye-sublimation heats dye into the plastic surface. It is permanent and gives very sharp, detailed legends, but because dye can only darken plastic, it cannot print light legends on dark caps. This is why dye-sub sets are usually dark-on-light.

Pad printing and laser etching sit on or just below the surface. They are cheap and are what you find on most budget boards. Pad-printed legends will fade with use.

Do keycap profiles matter?

Yes — profile changes typing feel more than plastic choice does. Profile describes the height and shape of the caps and whether rows are sculpted differently.

• OEM — the default on most pre-built keyboards. Medium height, each row angled differently. Familiar to nearly everyone.
• Cherry — similar shape to OEM but noticeably lower. A common enthusiast upgrade for a more compact hand position.
• MDA — sculpted like Cherry but with wide, spherical dished tops. The dish cradles the fingertip and is very comfortable for long typing sessions.
• SA — tall, heavily sculpted and spherical. Retro looking, loud, and it usually requires a wrist rest.
• XDA / DSA — uniform height across all rows. Clean looking and good for ortholinear boards, but the lack of sculpting makes touch typing by feel harder.
• Spherical / ball profile — deeply dished round tops, common on typewriter-style boards. Distinctive look and a strongly guided fingertip landing.

Changing profile changes the effective height of your keyboard, which changes wrist angle. Moving from OEM to SA is a large enough jump that a wrist rest usually becomes necessary.

Which keycaps should you buy?

Choose PBT if you want caps that look the same in two years, prefer a matte texture, and like a deeper sound. This is the right default for most buyers.

Choose ABS if RGB shine-through is important to you, if you want the most saturated colours, or if you like a smooth, slippery surface. Accept that high-use keys will shine.

Check compatibility before buying: confirm the set covers your layout's non-standard keys — a shorter right Shift, a 1.75u Enter, or a split spacebar will otherwise be left uncovered. The EWEADN keycap sets are cut for standard ANSI layouts including 60%, 65%, 75%, TKL and 98%.

Frequently asked questions

Do PBT keycaps ever shine?

Yes, but far more slowly. Heavy daily use will eventually polish PBT after two to three years, typically only on the most-used keys. ABS often shows visible shine within six months.

Are thicker keycaps better?

Thicker caps (1.4–1.6 mm) sound deeper and feel more solid than thin caps (around 1.0 mm) because there is more material to damp the impact. Thickness is one of the clearest predictors of a satisfying sound.

Will any keycap set fit my keyboard?

Only if the layout matches. Cross-compatible sets cover common variations, but non-standard bottom rows, stepped Caps Lock or split spacebars need specific kits. Always check the layout diagram before buying.

Do keycaps change how loud a keyboard is?

They change the pitch and character more than the volume. Thick PBT lowers the pitch and dries out the sound; thin ABS raises it and makes it clackier. Volume is mostly controlled by switches, foam and mounting.

Can I put PBT keycaps on a low-profile keyboard?

No. Low-profile keyboards use shorter switch stems with a different mount, so standard MX keycaps of any material will not fit. You need caps made specifically for low-profile switches.