Biggin's Bonnet is a unique Cap.
While its small bonuses to mana and life prevent Biggin's Bonnet from being useful past early game, it also possesses an off-slot bonus to all damage dealt from a weapon. This bonus can be helpful in some occasions, such as a hero's life stealing capability being insufficient.
Due to its very low item level, it is usually found in Normal Act I. At the same time, its high uqlvl makes it a very rare drop.
Stats[]

Biggin's Bonnet
Cap
Defense: 17-19 (varies)(Base defense: 3-5)
Required Level: 3
Durability: 12
+30% Enhanced Damage
+14 Defense
+30 To Attack Rating
+15 To Mana
+15 To Life
Normal Helms — Biggin's Bonnet (Cap) • Tarnhelm (Skull Cap) • Coif of Glory (Helm) • Duskdeep (Full Helm) • Howltusk (Great Helm) • The Face of Horror (Mask) • Undead Crown (Crown) • Wormskull (Bone Helm)
Exceptional Helms — Peasant Crown (War Hat) • Rockstopper (Sallet) • Stealskull (Casque) • Darksight Helm (Basinet) • Valkyrie Wing (Winged Helm) • Blackhorn's Face (Death Mask) • Crown of Thieves (Grand Crown) • Vampire Gaze (Grim Helm)
Elite Helms — Harlequin Crest (Shako) • Steel Shade (Armet) • Veil of Steel (Spired Helm) • Nightwing's Veil (Spired Helm) • Andariel's Visage (Demonhead) • Crown of Ages (Corona) • Giant Skull (Bone Visage)