/replaceitem entity @p slot.armor.head diamond_helmet 1 0 {display:{Name:"Tank Helmet",Lore:["You feel slower, but protected"]},AttributeModifiers:[{AttributeName:"generic.armor",Name:"armor",Slot:"head",Amount:3.0,Operation:0,UUIDMost:1,UUIDLeast:1},{AttributeName:"generic.movementSpeed",Name:"generic.movementSpeed",Amount:-0.05,Operation:0,UUIDMost:66122,UUIDLeast:55689}],ench:[{id:0,lvl:1}],Unbreakable:1}

/replaceitem entity @p slot.armor.feet diamond_boots 1 0 {display:{Name:"Tank Boots",Lore:["You feel stronger, and protected"]},AttributeModifiers:[{AttributeName:"generic.armor",Name:"armor",Slot:"feet",Amount:3.0,Operation:0,UUIDMost:1,UUIDLeast:1},{AttributeName:"generic.attackDamage",Name:"generic.attackDamage",Amount:1,Operation:0,UUIDMost:101245,UUIDLeast:5744789}],ench:[{id:0,lvl:1}],Unbreakable:1}