Football Boot Ground Type Guide: FG, AG, SG and MG

The right football boot is only right if the soleplate matches the pitch. You can get the size, fit and upper spot on, but the wrong studs can leave you short of grip on wet grass, uncomfortable on hard ground or wearing a soleplate that feels far too aggressive when you turn on 3G.

The quick version is FG for firm natural grass, AG for artificial grass, SG for soft natural grass and MG for players moving between approved grass and artificial surfaces. TF covers older, shorter astro, while IN or IC is for flat indoor courts and futsal. That will get most players to the right place, but there is more worth knowing underneath the boot. Two soleplates can both say FG and behave very differently, while an FG boot having rounded studs does not suddenly make it an AG boot.

Football Boot Ground Types: The Quick Version

Ground type	Best surface	Typical soleplate	Quick advice
FG - Firm Ground	Firm natural grass	Moulded plastic studs	The starting point for dry, firm or slightly damp grass
AG - Artificial Grass	Modern 3G artificial grass	Shorter, more numerous studs	Our recommended option for regular 3G football
MG - Multi-Ground	Firm grass and selected artificial pitches	Shorter, versatile moulded studs	Useful if you regularly move between approved surfaces
SG - Soft Ground	Soft, wet natural grass	Longer studs, often metal	For ground soft enough that FG can no longer penetrate properly
HG - Hard Ground	Very hard natural grass	Shorter, widely spread studs	Designed for dry, compacted natural pitches
TF - Turf	Older astro and harder artificial turf	Small rubber lugs	For shorter, harder artificial surfaces
IN/IC - Indoor	Indoor courts and futsal	Flat rubber outsole	For flat indoor playing surfaces

Stud length is only part of it. Shape and positioning change how the boot enters the ground, how much traction it gives you and how easily your foot can release when you turn. Rounded or conical studs generally allow easier rotational movement, while blades can give more directional bite. That becomes particularly important once artificial grass enters the conversation.

FG Football Boots: Firm Natural Grass

Firm Ground football boots are built primarily for natural grass that is dry, firm or slightly damp. Their moulded studs are long enough to find purchase in the soil without sinking as deeply as an SG plate, which is why FG covers such a large part of the football season.

FG is a category rather than one universal soleplate. Turn over an F50, Mercurial, Predator and Tiempo side by side and the differences are obvious. Some plates lean heavily on rounded conical studs, others use sharper directional shapes, and plenty mix both across the forefoot and heel. Two boots can carry the same FG label and still feel very different when you accelerate, plant and rotate.

On a normal grass pitch, FG is the obvious place to start. Problems arrive when the surface moves too far in either direction. On very hard ground, longer studs can create uncomfortable pressure because they cannot penetrate properly. On a genuinely soft winter pitch, an FG stud may only find the loose top layer of mud rather than firmer soil underneath. That is when SG starts to make more sense.

Can You Wear FG Football Boots on 3G?

This is the part of ground-type advice that needs more than a yes or no.

You will see plenty of players wearing FG football boots on 3G, but our recommendation is AG for AG wherever possible. A dedicated AG plate has been designed around artificial grass rather than adapted from a soleplate intended primarily for natural ground.

AG plates normally use shorter studs and more contact points across the outsole. This spreads the load across the foot rather than concentrating it through a smaller number of longer studs, while still giving enough traction for accelerating, stopping and changing direction on synthetic turf.

Not every football boot comes in AG, though. Sometimes the silo, tier or colourway you want is only available in FG, so it is worth understanding what you are looking at rather than treating every moulded soleplate the same.

Before anything else, check whether that exact boot is approved by the manufacturer for artificial grass. If it is, follow the brand's guidance. If it is not, we would still point you towards a dedicated AG or an approved MG option.

What If the Boot You Want Only Comes in FG?

If there is no AG version and you still decide to wear FG on artificial grass, a rounded or conical stud layout is generally the less aggressive FG option compared with a heavily bladed plate. Conical studs tend to allow the foot to rotate and release more naturally, whereas longer blades can bite more aggressively into synthetic turf when you plant and turn.

That is a compromise, not a substitute for an AG soleplate.

Conical FG does not automatically mean AG-safe or AG-approved. It is still an FG boot unless the manufacturer says otherwise. Using a football boot on a surface outside its approved use may also affect warranty cover, and individual facilities can have their own footwear rules.

So if FG really is your only option, we would rather see a rounded, less aggressive configuration than a heavily bladed one. We would still check the manufacturer's surface guidance first, and if artificial grass is not approved, wearing it there is at your own risk.

AG Football Boots: Artificial Grass

Artificial Grass football boots are made specifically for modern synthetic pitches, particularly 3G. If that is where most of your football happens, AG is where we would start.

Look underneath an AG boot and you will normally find more studs than on the equivalent FG version, with each stud generally shorter and often rounder. Spreading those contact points across the soleplate reduces the pressure running through each individual stud and gives the boot a less aggressive interaction with a surface that does not behave like soil.

This is why "they're plastic studs" is not enough to judge whether an FG boot is suitable for 3G. A long moulded blade and a short rounded AG stud may both be plastic, but they do very different jobs underneath the foot.

Some AG boots can also be used on firm natural grass where the manufacturer approves it. They will usually be at their best on artificial turf, though, and those shorter studs can run out of penetration once natural ground becomes properly soft.

MG Football Boots: Multi-Ground

Multi-Ground football boots make sense for players whose week is split between different pitches. Training might be on 3G under the lights before a weekend match on grass, and buying a separate pair for every surface is not realistic for everyone.

MG plates usually use shorter, more evenly distributed moulded studs to balance traction on firm natural grass with suitability for selected artificial surfaces. For players who want one pair to cover an approved mix of grass and 3G, they can be a very practical option.

They are particularly useful for younger players too. Two dedicated pairs can be a difficult sell when their feet have a habit of growing before either pair is worn out.

MG covers more than one approved surface, but a properly soft winter pitch is still SG territory. Brands also build MG plates differently, so check the surfaces approved for the exact model rather than assuming the letters cover everything.

FG vs AG vs MG: Which Should You Choose?

If most of your football is on natural grass, choose FG. If you are on 3G every week, choose AG. If you regularly move between firm grass and approved artificial surfaces and only want one pair, MG is usually the more practical route.

The important detail is underneath the boot rather than simply in the product name. Stud shape, length, number and positioning all affect how the soleplate behaves, particularly on artificial turf. An aggressive FG plate can feel very different from an FG design built around more rounded studs, even though both sit in the same ground-type category.

You will also see boots labelled FG/MG or FG/AG. Treat those as model-specific descriptions rather than universal standards. Different brands build and approve their soleplates differently, so the guidance for that actual boot is what matters.

SG Football Boots: Soft, Wet Natural Grass

Soft Ground football boots are made for natural pitches that have become soft enough that an FG soleplate can no longer penetrate properly.

That distinction is useful because SG is often reduced to "more grip". What the longer studs are really giving you is more penetration into soft soil. When a shorter FG stud is only finding loose mud at the surface, an SG stud can reach deeper and give your standing foot something firmer to work against.

SG plates normally use longer metal screw-in studs or a mixture of metal and moulded studs. You feel the difference when planting, accelerating and changing direction on a properly cut-up pitch, particularly through high-traffic areas where the top layer has already turned to mud.

Rain alone is not a reason to put SG boots on. A pitch can be soaked on top and still firm underneath. Use the warm-up to test it. Sprint, stop, plant your standing foot and change direction. If FG is still secure, there is no need to switch simply because the grass is wet. If the ground is moving underneath you and the studs cannot find enough purchase, that is what SG is there for.

Those long studs belong on soft natural ground. Keep SG away from hard surfaces and artificial grass.

TF Football Boots: Astro Turf

Older sand-based astro needs a different outsole again. TF football boots replace traditional studs with lots of small rubber lugs spread across the bottom of the shoe, giving you traction without digging too aggressively into a short, hard artificial surface.

That makes TF very different from AG despite both sitting under the wider artificial-pitch umbrella. Modern longer-pile 3G generally points towards AG, while older short-pile astro is where a turf sole comes into its own.

Those shallow lugs also explain why TF is a poor choice for wet natural grass. There simply is not enough stud depth to penetrate a soft pitch.

HG Football Boots: Hard Ground

HG is a much less common sight in the UK, but it exists for very dry, compacted natural pitches where a normal FG stud struggles to enter the ground.

Hard Ground plates generally use shorter studs and spread them across a wider area. That reduces the pressure underneath the foot when the surface is too firm for a longer stud to sink in properly.

Think of a baked summer grass pitch rather than artificial turf. Both can feel hard underneath your feet, but they are still different playing surfaces and need treating that way.

IN and IC Football Shoes: Indoor and Futsal

Indoor football shoes use a flat rubber outsole with no traditional football studs. They are normally labelled IN, IC or sometimes Sala and belong on sports-hall floors, indoor courts and futsal surfaces.

The word "indoor" can cause confusion here. An indoor 3G pitch is still 3G. If there is synthetic grass underneath your feet, choose footwear for that surface. IC refers to the flat court, not whether there happens to be a roof above it.

What's the Difference Between 3G, 4G and Astro?

Artificial-pitch names are often used loosely, which is another reason to look at the actual surface rather than relying entirely on what someone calls it.

3G normally means longer synthetic grass with an infill system, commonly sand and rubber granules. AG football boots are our starting recommendation.

4G is widely used for newer artificial pitches, but it does not describe one universally standardised surface with one universal footwear rule. Check with the facility.

Astro generally refers to older, shorter artificial turf, often sand-based. TF boots with their smaller rubber lugs are usually better suited to those harder, lower-pile surfaces.

If you are unsure, ask the venue before turning up. Their footwear rules should settle it.

Which Football Boot Ground Type Should You Choose?

For most players, the quick version at the top of the page still covers it:

Firm natural grass: FG
Modern 3G artificial grass: AG
Wet, soft natural grass: SG
Firm grass and selected artificial surfaces: MG
Older, short astro turf: TF
Indoor court or futsal: IN/IC

Most players do not need a different pair of boots for every possible surface, but they do need to understand what the soleplate is built for. If most of your football is on natural grass, FG is the obvious place to start. If you are on 3G every week, go AG. If you are constantly moving between the two and want one pair to cover both, MG or another properly approved dual-surface option is usually the cleaner compromise.

Where you need to be more careful is FG on artificial grass. Plenty of players do it, and we understand why. Not every silo, tier or colourway comes with an AG plate, so sometimes the boot you actually want only exists in FG. If you end up in that situation, a rounded or conical stud pattern is generally the FG setup we would rather see on artificial grass than a long, aggressive bladed plate. It should rotate and release more naturally underfoot, which is a better fit for the way you move on 3G.

That still does not make it an AG boot. Our recommendation remains AG for AG wherever possible, and the manufacturer's approved surfaces should always come first. If an FG boot is not approved for artificial grass, using it there can affect warranty cover and sits outside our recommendation. Conical FG can be the better FG option for 3G when there is no AG version available, but it is still FG.

The upper might be the part everyone talks about, but get the soleplate wrong and you will notice it within the first few turns. Start with the surface, then choose the boot.