CS2 armor system: Kevlar vs Helmet, when to buy, and how damage reduction actually works

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CS2 armor system: Kevlar vs Helmet, when to buy, and how damage reduction actually works

Armor is one of the most misunderstood parts of CS2. Most players know they should buy it, but fewer can explain what it actually protects, how the math works, or when the helmet is worth the extra $350. This guide breaks down the mechanics so you can make better buy decisions.

What armor covers

The Kevlar Vest ($650) protects the chest, stomach, and arms. It reduces incoming bullet and grenade damage based on the weapon's armor penetration value. The vest also nearly eliminates aimpunch (screen shake when hit) for body shots, which is a bigger deal than most people realize.

The Kevlar + Helmet ($1,000) adds head protection. The helmet prevents one-shot headshot kills from most weapons. Without a helmet, even an M4A4 can kill with a single headshot.

If you already have a vest with 100 armor points, you can buy just the helmet upgrade for $350. If your armor took damage, the upgrade costs the full $1,000.

Weapons that ignore the helmet

Some weapons kill through a helmet regardless. Knowing which ones matters for buy decisions:

• AK-47: one-shot headshot at all ranges
• SG 553: one-shot headshot at all ranges
• Desert Eagle: one-shot headshot at close to medium range
• AWP: one-shot kill to any body part except legs
• SCAR-20 / G3SG1: one-shot headshot at most ranges
• SSG 08: only against unarmored opponents

On CT side, if the enemy team is only using AK-47s and AWPs, some players skip the helmet since these weapons kill through it anyway. That saves $350 for a better rifle or utility.

How damage is calculated

The formula runs in this order:

1. Base damage is set by the weapon
2. Range modifier reduces damage over distance (each weapon has different falloff)
3. Hitbox multiplier is applied based on where the bullet hits
4. Armor reduction is applied if the target has armor covering that hitbox

Hitbox multipliers

• Head: 4x (most weapons)
• Chest / Arms: 1x
• Stomach: 1.25x
• Legs: 0.75x

Leg shots are never reduced by armor. The 0.75x multiplier means leg shots deal less base damage, but armor does nothing to protect them.

Armor damage reduction example

When a bullet hits an armored hitbox, the damage is multiplied by the weapon's armor penetration percentage:

• AK-47 base damage: 36, armor penetration: 77.5%
• Armored chest shot: 36 x 1.0 x 0.775 = 27 damage
• Unarmored chest shot: 36 x 1.0 = 36 damage

The AK-47 loses about 22.5% of its damage against a vested target. Weapons with 100% armor penetration (like the SG 553) bypass armor entirely.

Armor points

Armor starts at 100 points. Each hit absorbed reduces the armor value, but as long as armor points remain above 0, the full damage reduction applies. There is no difference between 100 armor and 1 armor in terms of protection.

Armor is typically damaged by approximately 2 points for every 1 point of damage absorbed. A player can go many rounds without needing to rebuy armor if they take limited damage.

Aimpunch

Aimpunch is the screen shake when you take damage. Armor dramatically reduces it:

• Without armor: severe aimpunch that makes accurate shooting nearly impossible
• With vest: 95% reduction in aimpunch for body shots
• With helmet: near-complete elimination of aimpunch for headshots

This is one of the primary reasons armor is considered essential on buy rounds. Getting hit without armor can ruin your aim for the rest of the fight.

When to buy what

• Kevlar Vest ($650): buy on every buy round, even force buys
• Helmet ($350 upgrade or $1,000 full): essential against M4A4 and M4A1-S, which need an extra shot to kill a helmeted target
• Eco rounds: skipping armor allows faster economy recovery but significantly reduces survivability
• T side: helmets are usually well-advised since the M4A4 and M4A1-S require an extra shot against a helmeted opponent

Source
[1] CS2 Wiki: Armor and Damage System
[2] Counter-Strike Wiki: Kevlar + Helmet