Slow resist

Slow resist (or Slow resistance) is a stat that reduces the strength of slows and self- slows. It can be obtained from champion abilities, items, and runes, and stacks additively. It applies to already active slows. Not to be confused with tenacity, which reduces the duration of crowd control effects (including slows), and doesn't apply to already active effects.

Increasing Slow Resist

Items

Boots of Swiftness

Champion abilities

Urgot's Purge grants him 40% slow resist while active.

Runes

Slow Immunity

Slow immunity is different from 100% slow resist as it will remove any

slows or

cripples as they are applied.

Champion abilities

Items

Mikael's Crucible

Formulas

These formulas can calculate how much slow resist you have, based on your movement speed and on the slow applied to you.

Slow Resist is the amount of slow resist you currently have.
Final MS is your movement speed after being slowed, already considering your slow resist.
BaseMS is your base movement speed.
BonusMS is the sum of all additive flat movement speed bonuses.
MS Multiplier is the sum of all additive percent movement speed bonuses.
Slow is the strongest slow currently applied on your champion.
Slow Resist, MS Multiplier, and Slow are percentages (e.g. 50% is 0.5 in the formula).

Formula one:

$ \pagecolor{black}\color{White} Movement\ Speed \leq 220: $ $ \pagecolor{black}\color{White} Slow Resist = 1 - ({{1 - {{FinalMS - 110} \over {(BaseMS + BonusMS) \times (1 + MS Multiplier) \times 0.5}}}) \div {Slow}} $

Formula two:

$ \pagecolor{black}\color{White} 220 \leq Movement\ Speed \leq 415: $ $ \pagecolor{black}\color{White} Slow Resist = 1 - ({{1 - {{FinalMS} \over {(BaseMS + BonusMS) \times (1 + MS Multiplier)}}}) \div {Slow}} $

Formula three:

$ \pagecolor{black}\color{White} 415 \leq Movement\ Speed \leq 490: $ $ \pagecolor{black}\color{White} Slow Resist = 1 - ({{1 - {{{{FinalMS - 475} \over {0.5}} + 490} \over {(BaseMS + BonusMS) \times (1 + MS Multiplier)}}}) \div {Slow}} $

Formula four:

$ \pagecolor{black}\color{White} Movement\ Speed \geq 490: $ $ \pagecolor{black}\color{White} Slow Resist = 1 - ({{1 - {{{{FinalMS - 415} \over {0.8}} + 415} \over {(BaseMS + BonusMS) \times (1 + MS Multiplier)}}}) \div {Slow}} $

Trivia

Example of slow resist effect: A champion with Boots of Swiftness, a movement speed of 400 and who is affected by a 40% slow will have a movement speed of 400 × (1 − (0.4 × 0.75)) = 280, which is equal to a 30% slow without slow resist.

Last updated: December 6, 2017, patch V7.24

The biggest amount of slow resist obtainable is 155% with Urgot.

40% +

25% +

75% +

15% = 155%

With this amount of slow resist, slows will no longer slow you. They will however increase your movement speed by (slow% × 55)%, stacking multiplicatively with Phase Rush's bonus.

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Champion statistics

Offensive	Ability power · Attack damage · Attack speed · Critical strike chance · Critical strike damage · Armor penetration · Magic penetration · Life steal · Spell vamp · True damage
Defensive	Heal and shield power · Health · Health regeneration · Armor · Magic resistance · Tenacity · Slow resist
Utility	Cooldown reduction · Energy · Energy regeneration · Mana · Mana regeneration
Other	Experience · Gold generation · Movement speed · Range