Special Saver

Each time you get splatted, your special gauge is reduced. Special Saver reduces the special gauge loss after death. The maximum amount you can avoid losing is 50% of the level of your Special Gauge at the time you are splatted (e.g. if you have a full Echolocator charge of 200 points, you can keep up to 100 points on top of what you would have kept ordinarily). Zekko gear has a 5x chance of rolling this ability.

In-Depth Ability
Normally you lose 40%, 60%, or 75% (depending on the Special Depletion of your weapon) of your special gauge meter upon getting splatted, but if you fully stack Special Saver, you lose as little as nothing. This ability is very helpful for those times when you get splatted just before being rewarded a special, or after you've earned it but before you've had a chance to use it.

Use
This ability saves the player's special gauge meter getting splatted by the other's team Inkling or falling to water that causes them to dissolve and respawn. It has no other effects.

Special Saver tends to be useful at weapons that have hard time covering turf like Blasters and some long range shooters, and specials that require a lot of Ink to fill charge like Kraken, Inkzooka or the Echolocator.

Note that Special Saver preserves a percentage of your Special Gauge regardless of the Special Depletion level of your weapon. For instance, with maximum Special Saver (50% preserved) and a Medium Depletion weapon (60% lost), you would lose a total of 10% of your accumulated Special Gauge. This means that there is no point in stacking more than 40% worth of Special Saver if you're using a Light Depletion weapon.

Gear
Special Saver is the main ability of:

Stacking
Heavy Depletion weapons start at saving 25%, Medium Depletion weapons start at saving 40%, and Light Depletion weapons start at saving 60%.