T-shirt is a Wardrobe Must have piece regardless of the season. I personally love pieces which you can use in transition seasons or layer them.
I want to share with you the best T-Shirts which I believe are great for layering. T-Shirts are like "Styling Tool" as in the Summer season you can wear them alone as one piece, in the cooler months you can create range of style, you can layer them under a dress, you can wear them with jacket, shirts, sweaters you name it.
The most important thing about learning how to layer is getting your basic pieces. If you want to take your layering into next level start from cozy sweaters, pastel coats, leather pants. Combining different garments in layers can be used to create edge outfit.
The T-Shirts which I suggest to have are:
Casual Black Cotton T-Shirt (shop here)
Classic Crew Neck Tee (shop here)
Ribbed High Neck Long Sleeve T (shop here)
Long T-Shirt (shop here)
Buttoned T-Shirt (shop here)
I hope you will get more inspired, do let me know which outfit is your favorite and do let me know how you like to layer pieces.
I believe that what you wear tells a lot about your personality. Fashion are clothes, but style is what you do with it.