Each armor has its own style and what comes with it is usually some unique features.
Strapped
You have free hand when using this shield. If you equip another shield the bonuses does not stack, meaning you take the higher bonus only.
Deflect
If you have Shield Combat talent, the die you roll when performing a Block Reaction increases by one size.
Bludgeoning Vulnerability
This armor does not protect well against Bludgeoning damage type which reduces Damage Reduction by 1.
Piercing Vulnerability
This armor does not protect well against Pierce damage type which reduces Damage Reduction by 1.
Sturdy
Even if your armor loses all its Armor Points it still gives you 1 point of damage reduction.
Noisy
You have Disadvantage on all Stealth checks.
Hindering
You have Disadvantage when performing skills from Acrobatic and Survival skill groups (except Track).
Partial Hindering
You have Disadvantage when performing skills from Acrobatic and Survival skill groups (except Track). You can remove this effect if your Strength is 6 points higher than the required value.