The Inventory consists of all the items the player is carrying. This includes quick-slot and equipped items.
To toggle the display of the inventory press the i key.
There is no limit to the number of items in the inventory, however the player will have a weight limit based on their current Strength stat. If the player tries to move while over encumbered they will take a massive stamina penalty or if there is insufficient stamina the player will take damage.
Items can be carried in Containers which will reduce their weight on the player by 50%.