Item sets

Item sets are a game concept introduced in the Mann-Conomy Update, which applies new attributes (such as greater damage resistance, immunity from headshots, etc.) to the wearer when all items in the set are equipped. There are currently five items sets, all of which are from the Polycount Pack.

Since Valve is of the opinion that game-changing effects should be available for every player within a reasonable amount of time, hats included in these sets are the only hats in the game to have guaranteed crafting blueprints (not including the Bonk Helm), requiring four Refined Metal and any Polycount Pack weapon from the set you want to craft the hat for.

The Scout

Main article: Item sets

The Special Delivery
	Shortstop Mad Milk Holy Mackerel Milkman
Effect	Leave a Calling Card on your victims

• Primary - Shortstop: On Hit: Slow target movement by 40% for 0.5 seconds.

• Secondary - Mad Milk: Players heal 75% of the damage done to an enemy covered with milk.

• Melee - Holy Mackerel: Getting hit by a fish has got to be humiliating.

• Headwear - Milkman: A headwear item for the Scout.

The Soldier

Main article: Item sets

The Tank Buster
	Black Box Battalion's Backup Grenadier's Softcap
Effect	Leave a Calling Card on your victims

• Primary - Black Box: On Hit: +15 health, -25% clip size.

• Secondary - Battalion's Backup: Provides a defensive buff that protects nearby team members from Crits and blocks 35% of incoming damage. Rage increases through damage taken.

• Headwear - Grenadier's Softcap: A headwear item for the Soldier.

The Pyro

Main article: Item sets

The Gas Jockey's Gear
	Degreaser Powerjack Attendant
Effect	Leave a Calling Card on your victims

• Primary - Degreaser: 65% faster weapon switch, -25% burn damage.

• Melee - Powerjack: +25% damage done, +75 health restored on kill, no random Critical hits.

• Headwear - Attendant: A headwear item for the Pyro.

The Sniper

Main article: Item sets

The Croc-o-Style Kit
	Sydney Sleeper Darwin's Danger Shield Bushwacka Ol' Snaggletooth
Effect	Leave a Calling Card on your victims

• Primary - Sydney Sleeper: On Hit: Jarate applied to target for 8 seconds, no random Critical hits, this weapon can't headshot enemies.

• Secondary - Darwin's Danger Shield: +25 max health on wearer.

• Melee - Bushwacka: This weapon Crits whenever it would normally Mini-Crit, 20% fire damage vulnerability on wearer.

• Headwear - Ol' Snaggletooth: A headwear item for the Sniper.

The Spy

Main article: Item sets

The Saharan Spy
	L'Etranger Your Eternal Reward Familiar Fez
Effect	Extra effects when taunting.

• Primary - L'Étranger: +15% Cloak on hit, -20% damage done.

• Melee - Your Eternal Reward: Upon a successful backstab, you rapidly disguise as your victim. This weapon is a silent killer, the wearer cannot use the Disguise Kit.

• Headwear - Familiar Fez: A headwear item for the Spy.

Bugs

• Due to how the bullet vulnerability is calculated, certain non-bullet weapons deal 10% more damage to a Gas Jockey's Gear Pyro. This includes the Syringe Gun, all melee weapons, the Targe Bash, and most taunt attacks.
• Snipers who have the entire Croc-O-Style Kit equipped can die to headshots if they have 1 health point. This is either a bug, or a misconception caused by the set bonus description.