Chris Birchby, founder of sun-care Coola argues that:

a) The higher the values of the SPF the lower the chances are of skin irritation.

b) SPF under 50 are not recommended because they contain more active ingredients which could cause skin irritation.

c) The higher the values for SPF the lower is the risk of skin irritation.

d) The protection of SPF above 50 is so effective that it outweighs the chances of skin irritation.

e) The extra ingredients used on SPF above 50 could increase the chances of skin irritation

Responda: Chris Birchby, founder of sun-care Coola argues that: