Inventory is almost always considered a current asset.
A current asset is any asset that will provide an economic benefit for or within one year. A non-current asset is an asset that will provide an economic benefit after or for longer than one year. Inventory production is typically closely correlated with demand, so it will almost always be sold within a year or being produced, making it a current asset. In the event that an inventory item is expected to sell after a year, it will be a non-current asset.