Aken Ankle Guard (and its smaller counterpart Aken Strap) is meant to be a helpful tank item for champions with large hitboxes and low/situational mobility.
Aken Strap:
http://i57.tinypic.com/i5rp21.png
Recipe: 
+ 
+ + 200 gold = 800 gold total.
+125% health regen.
20 armor.
UNIQUE Passive - Your champion ignores unit collision.
.
Aken Ankle Guard:
http://i59.tinypic.com/j8nos4.png
Recipe: 
+ Aken Strap + 800 gold = 2800 gold total.
+250% health regen.
+60 armor.
UNIQUE Passive - Every 10 seconds (-0.5 seconds per level) you heal 1 HP per 1% of your missing health.
The amount healed is increased by bonus health regeneration from other sources.
UNIQUE Passive - Your champion ignores unit collision.
UNIQUE Passive - Point Runner: +10% Movement Speed, this bonus is doubled while near turrets, fallen turrets, and minions.
+ 
+ 
