Answer: Atleast 15 spf
Step-by-step explanation:
SPF can be defined as the sun protection formula which is applied on the part of the part of the body which is going to be exposed in the sun.
Before 15 minutes to going out in the sunlight, sun protection formula should be applied on the bare skin.
The Different types of SPF protects different percentage of sunlight and the body is protected from the harmful UV rays of the sun that tans the body, spoils the texture of the skin and protects from skin cancer.
A spf 15 will protect 93% of the sun rays falling on it which is good if going out for exercise.