Perks are divided into three categories.

Perk category 1
Danger Close: Deal more explosive and Scorestreak damage.
Flak Jacket: Receive less explosive damage. Cancel frag cooking upon weapon switch. Resets fuse when throwing back frags.
Lightweight: Faster movement rate.
Low Profile: Invisible to UAVs, tracking rounds, and Exo-Ping.
Overcharged: Increase Exo-Ability battery life. Concuss enemies with Boost Slam.

Perk category 2
Blind Eye: Undetectable by Tracking Drones, Explosive Drones, and all Scorestreaks except UAV.
Cold-Blooded: Immune to Thermal, Target Enhancer, Threat Grenade, and enemy call-outs. No name displayed or reticle color change when targeted.
Fast Hands: Reload while sprinting. Swap weapons, use Exo-Abilities, and Exo-Launcher faster.
Gung-Ho: Shoot while sprinting and sliding.
Peripherals: Increased mini-map range. Take out enemies without displaying death locations.

Perk category 3
Blast Suppressor: Invisible on mini-map during Exo-moves.
Hard Wired: Immune to System Hack, EMP, Nano Swarms, Stun Grenades, and Scramblers. However Scorestreaks remain vulnerable.
Hardline: Decrease Scorestreak cost by 100.
Scavenger: Start with extra magazines and resupply bullet ammo from fallen enemies.
Toughness: Flinch less when shot.