Chronos Mail

A Chronos Mail is an Armor-class piece of armor introduced in Golden Sun: The Lost Age.

Basic Description by Game
In all its appearances, the Chronos Mail increases the wearer's base Defense by 47. In addition, it increases the wearer's base HP rating by 20. It can be bought for 13100 coins and sold for 9825 coins.

In The Lost Age, it is obtained by bringing a Golem Core forgeable item to Sunshine the blacksmith in Yallam, where he will randomly forge it into that or several other items, and then buying it from him. As an Armor-class item, it is equippable by the warrior-style Adepts Felix, Piers, Isaac, and Garet.

In Golden Sun: Dark Dawn, the Chronos Mail is now a rare drop from a Grisly, which is located in and around Snowdrift Shrine. It can be equipped by Matthew, Tyrell, and Eoleo.

Analysis
The high Defense rating and boost to HP make this probably the best item to have in the chest slot of an Adept's equipment if an Adept needs to have more overall sturdiness. Various players would likely prefer high-defense gear that provides bonuses of a different category, though, such as for resistance (Storm Gear), attack power (Xylion Armor), or Unleash rate increase (Valkyrie Mail and Mythril Clothes).