Armor comes in three ranks. Light, Medium, and Heavy. Each has it's benefits and drawbacks.
Light armor offers the least protection on it's own, but has the benefit of allowing you to add your dexterity modifier to your armor class. It takes 1 minute to don or doff light armor.
AC = 11 + Dex modifier (Disadvantage on Stealth checks)
Cost: 5 gp
Weight: 8 lb.
AC = 11 + Dex modifier
Cost: 10 gp
Weight: 10 lb.
AC = 12 + Dex modifier
Cost: 45 gp
Weight: 13 lb.
Medium armor offers a moderate amount of protection, but only allows you to add a maximum of 2 from your dexterity modifier to your armor class. It takes 5 minutes to don and 1 minute to doff medium armor.
AC = 12 + Dex modifier (max 2)
Cost: 10 gp
Weight: 12 lb.
AC = 13 + Dex modifier (max 2)
Cost: 50 gp
Weight: 20 lb.
AC = 14 + Dex modifier (max 2) (Disadvantage on Stealth checks)
Cost: 50 gp
Weight: 45 lb.
AC = 14 + Dex modifier (max 2)
Cost: 400 gp
Weight: 20 lb.
AC = 15 + Dex modifier (max 2) (Disadvantage on Stealth checks)
Cost: 750 gp
Weight: 40 lb.
Heavy armor is bulky, and difficult to move in without making sound, but offers the greatest protection of the armor ranks. It takes 10 minutes to don and 5 minutes to doff heavy armor.
AC = 14 (Disadvantage on Stealth checks)
Cost: 30 gp
Weight: 40 lb.
AC = 16 (Disadvantage on Stealth checks) (Requires a strength score of 13 or higher)
Cost: 75 gp
Weight: 55 lb.
AC = 17 (Disadvantage on Stealth checks) (Requires a strength score of 15 or higher)
Cost: 200 gp
Weight: 60 lb.
AC = 18 (Disadvantage on Stealth checks) (Requires a strength score of 15 or higher)
Cost: 1500 gp
Weight: 65 lb.