Equipment becomes available when you reach the Modern sawmill.
You will see a suitcase icon at the bottom of the screen - tap it to open the equipment menu.

Here you can equip clothing items that give useful bonuses, such as more order cash or a higher offline limit.

   
Items have different rarities. Higher rarity gives stronger bonuses.
The rarities are:  Common, Rare, Epic, Legendary, and Ultimate.

• Common -brown;
• Rare - blue;
• Epic- purple;
• Legendary - yellow;
• Ultimate - red.

You can get equipment items from outfit chests found in the store, events, and the Lumber Pass.

To equip an item, tap it and press Wear. To remove it, tap Unwear.
You can also check the bonus of each item by tapping its card.