Fashion - Sunday casual basics

Hey lovelies,
I'm back with a fashion post, an outfit perfect for a casual Sunday made up with "basic" items that are inexpensive but classic and can be worn together or with other items from your wardrobe to create a variety of different looks. 
Today I have teamed a white T-shirt from New look and black leggings from Topshop with my converse and a classic leather cross the body bag from Topshop, to make a comfy casual Sunday look.

The T-shirt could easily be worn with jeans or tucked into a skirt with a blazer, denim or leather jacket in fact it could be worn with anything, same goes for these thicker leggings they would look great with heels or trainers with a pretty blouse or khaki shirt with a bomber jacket. You see where I'm going with this, basic items are an essential part of your wardrobe. 

What are your wardrobe essentials?