I purchased the crave dual guard for my 4a. For me, it is the perfect amount of protection with minimal bulk! Also, really enjoying the green color (out of stock). Very high quality feel for the price. The back might feel a bit slick for some, but I don't mind.

https://www.amazon.com/dp/B088HHL5X4/ref=cm_sw_r_cp_apa_i_0jDsFb9SZK021