How Item Insulation Works in DayZ

Expand the following to see the exact insulation values for each item.

See below for detailed explanation.

As of DayZ 1.26 item insulation values are more important than ever. Here is how the insulation value of an item is calculated by the game:

heatIsoloation * WETFACTOR * HEALTHFACTOR = Insulation Value

Where (explained in depth below):

• heatIsolation is a numeric value between 0.0 and 1.0 (and sometimes higher on modded servers)
• WETFACTOR is a number between -0.15 and 1.0 based on how wet/saturated the item is. -0.15 is "Drenched" and 1.0 is "Dry" in the game
• HEALTHFACTOR is a number between 0.0 and 1.0 based on the health of the item. 0.0 is "Ruined" and 1.0 is "Pristine"

heatIsolation - Numeric Insulation Value

Note: expand the sections at the top of the page to see the exact heatIsoloation ratings for all items

The game code includes a specific insulation number for each item called "heatIsolation". However, this number is not visible during gameplay. These numbers translate to the text insulation values we see in the game (e.g. "Best", "High", etc.). This is important to know because two items might be in the same insulation category (e.g. "Best") but have different actual heatIsolation values. For example, both Padded Gloves and Wool Gloves have "Best" insulation. But they have different heatIsolation ratings:

Padded Gloves = 1.0
Wool Gloves = 0.89999998

So, while they're both "Best" which is what we see in the game, the Padded Gloves actually have 10% more insulation than the Wool Gloves. The game assigns a text insulation value based on the following ranges (special thanks to STRYKER in the DayZ Discord server for figuring this out):

New in 1.26 is the fact that different color variants of some items have different insulation values. For example the Winter Hunting Jacket is Best Insulation while the Summer Hunting Jacket is Low Insulation.

Item Health/Damage Impacts Insulation Value

Thanks to LiveBait in the DayZ Discord server, we know exactly how much an item's health impacts its insulation value. The game uses an item health multiplier which is multiplied by the item heatIsolation number (and Wetness, below) to determine the insulation value based on item health. See the table below. For example, a Badly Damaged item has 1/2 of the insulation value the item would have if it were pristine.

Item Wetness/Saturation Impacts Insulation Value

Thanks to LiveBait in the DayZ Discord server, we know exactly how much an item's wetness impacts its insulation value. The game uses an item wetness multiplier which is multiplied by the item heatIsolation number (and Damage value) to determine the insulation value based on item wetness. See the table below. For example, a Soaked item has 1/2 of the insulation value the item would have if it were Dry.

Examples

A pristine Winter Hunting Jacket has a heatIsolation value of 1.0 (Best). But if it was Damaged, its insulation value would be 0.8 (High)
1.0 * 0.8 = 0.8
If it was also Soaked, its insulation value would be 0.08 (Low)
1.0 * 0.8 * 0.10 = 0.08

With Sakhal available on all platforms, it's now more important than ever to understand how insulation values work and spend more time in-game considering damage and wetness when selecting attire to protect you from the cold!

How Each Clothing Slot Impacts Player Heat Comfort

See below for the weight given to each clothing/equipment slot when determining overall player heat comfort.
//! how much this body part affects final heatcomfort
static const float ENVIRO_HEATCOMFORT_HEADGEAR_WEIGHT = 0.05;
static const float ENVIRO_HEATCOMFORT_MASK_WEIGHT = 0.05;
static const float ENVIRO_HEATCOMFORT_VEST_WEIGHT = 0.04;
static const float ENVIRO_HEATCOMFORT_BODY_WEIGHT = 0.12;
static const float ENVIRO_HEATCOMFORT_BACK_WEIGHT = 0.03;
static const float ENVIRO_HEATCOMFORT_GLOVES_WEIGHT = 0.04;
static const float ENVIRO_HEATCOMFORT_LEGS_WEIGHT = 0.12;
static const float ENVIRO_HEATCOMFORT_FEET_WEIGHT = 0.06;
static const float ENVIRO_HEATCOMFORT_HIPS_WEIGHT = 0.00;


PS - Interesting fact, the tanker helmet is the only headgear that provides bullet protection (albeit very little) and Best Insulation.