FG, SG or AG ?

Alright, this one comes up almost as much as the position question: "what do FG, SG and AG actually mean, and which one do I need?" Most people look at the colorway first and the soleplate last. Honestly that's backwards. The wrong soleplate can make even the best boot feel terrible, and on the wrong surface it can wreck the boot or your knees. So let's clear it up, code by code.

Which Football Boot Soleplate Do You Need? The Short Answer

Pick the soleplate for the surface you play on most. FG (firm ground) is for dry or normal natural grass, SG (soft ground) is for wet, muddy grass and usually has metal studs, AG (artificial grass) is for modern 3G pitches, TF (turf) is for short, hard artificial pitches, and IC (indoor court) is for sports halls and futsal. If you play on two very different surfaces every week, two pairs beat one compromise.

What Does FG Mean on Football Boots?

FG stands for firm ground, and it's the default soleplate for most football boots. If a boot only came out in one version, it was almost always FG.

• Made for natural grass in normal conditions, dry to slightly damp.
• Molded studs, either bladed, conical or a mix of both, that can't be removed.
• The most common version for classic and vintage boots, so it's what you'll see most in our catalog.

If you play on a decent grass pitch most weekends, FG is your answer. Simple as that.

What Does SG Mean on Football Boots?

SG means soft ground. Think rainy winter games, muddy pitches, grass that's properly cut up by the 60th minute.

• Fewer but longer studs, usually screw-in metal or mixed metal and molded studs.
• They dig deep into soft ground, so you don't slip when you plant your foot.
• On firm or dry ground they're a bad idea. The studs don't sink in, which means less stability and more pressure on your joints.

Quick heads up: a lot of youth and amateur leagues don't allow metal studs, so check your league rules before you buy SG.

SG versions of classic models are a collector favorite, by the way. The Adidas Predator Mania SG is basically the definition of a 2000s rainy-day boot.

What Does AG Mean on Football Boots?

AG stands for artificial grass, meaning the modern 3G pitches with longer synthetic fibers and rubber crumb that you find almost everywhere now.

• More studs, but shorter, and usually hollow and conical.
• Spreads the load across the whole foot, so your foot doesn't get "stuck" in the surface when you turn.
• Often feels a bit smoother and more forgiving than the FG version of the same boot.

If you train on 3G all week, an AG pair (or at least an MG pair, more on that below) is the smart move.

What Are TF and IC Football Boots?

These are the two non-stud options, and people mix them up constantly.

• TF (turf): lots of small rubber nubs. Made for short, hard artificial pitches, the old-school astro surfaces and a lot of 5-a-side cages.
• IC or IN (indoor court): a completely flat rubber sole. Made for sports halls, futsal courts and any smooth indoor floor.

Don't take IC shoes onto astro and don't take TF onto a polished hall floor. You'll either slide around or mark up the floor, sometimes both.

What About HG, MG and TRX? The Codes You See on Older Boots

If you're into vintage boots, you'll run into a few extra codes that newer buyers don't know.

• HG (hard ground): made for dry, hard natural pitches. HG versions were especially common in Asian markets and are a nice find for collectors.
• MG (multi ground): a middle-ground soleplate designed to work on both firm grass and artificial grass.
• TRX: Adidas' traction label from the Adizero era, so you'll see names like TRX FG, TRX SG or TRX HG. The part after TRX tells you the ground type. You can see it on pairs like the Adidas F50 Adizero TRX FG.

Can You Wear FG Boots on Artificial Grass?

Real talk: you can, and loads of people do. But it's not ideal.

• FG studs grip harder on 3G than they're designed to, which puts extra stress on your ankles and knees when you turn.
• The soleplate takes more stress too, so studs can wear faster or even break.
• Many brands say FG boots aren't made for artificial surfaces, which can matter if something goes wrong.

For the odd game it's usually fine. For three training sessions a week on 3G, get an AG or MG pair and save your FG boots for grass.

Ground Types and Vintage Boots: What Collectors Should Know

This part is specific to classic boots, and it matters if you actually plan to play in yours.

• Dedicated AG soleplates only really went mainstream in the 2010s, as 3G pitches spread. Most classics from the 90s and 2000s, like the Total 90 or early Predators, were built for natural grass in FG or SG.
• A deadstock pair can be unworn and still be 15 or 20 years old. The materials and glue have aged, even if the boot looks brand new, so don't throw it straight into weekly 3G sessions.
• If you want to play in a vintage pair, natural grass is the safest bet. Keep the rare stuff for the display cabinet anyway.

Quick Cheat Sheet

One Last Thing

Soleplate first, then fit, then the boot that suits your game. Once you know your surface, check our guide on how football boots should fit, and then find your category in our best football boots for every position guide.

FAQs About Football Boot Ground Types

What does FG mean on football boots?

FG stands for firm ground. FG boots have molded, non-removable studs and are made for natural grass in dry to slightly damp conditions. It is the most common soleplate, and most classic boots were released primarily in FG.

What does SG mean on football boots?

SG stands for soft ground. SG boots have fewer, longer studs, often metal screw-ins, designed to dig into wet and muddy grass. Many youth and amateur leagues restrict metal studs, so check your league rules first.

What does AG mean on football boots?

AG stands for artificial grass. AG soleplates use more, shorter, usually hollow studs that spread pressure across the foot on modern 3G pitches.

Can I wear FG boots on artificial grass?

Occasionally, yes, but it isn't ideal. FG studs grip harder on 3G than they are designed to, which adds stress on the ankles, knees and soleplate. For regular 3G play, an AG or MG boot is the better choice.

What is the difference between TF and IC boots?

TF (turf) boots have small rubber nubs for short, hard artificial pitches and astro. IC or IN (indoor court) boots have a flat rubber sole for sports halls and futsal courts.

What does TRX mean on Adidas boots?

TRX is the traction label Adidas used on boots such as the F50 Adizero. The letters after it give the ground type, for example TRX FG for firm ground or TRX SG for soft ground.

Can I play in vintage boots on 3G?

It is not recommended for regular use. Most classic boots were designed for natural grass, and even unworn deadstock pairs have aged materials and adhesives. If you want to play in a vintage pair, natural grass is the safest choice.

Find the Right Soleplate for Your Pitch

Every pair in our catalog is brand new, unworn and 100% authentic, with worldwide shipping, and the soleplate is listed on every product page. Browse the Predator, Mercurial Vapor, F50 and Tiempo collections, and if you're hunting a specific model in SG or HG, reach out. Rare versions come through our hands regularly.