How do i fix zooming out of my theme on phone?

[teetrendz]

On my phone when i visit my store i can zoom out of the theme, how do i fix this? 

My store is: https://teetrendz.nl

[Annapeter1q]

Hello Teetredz,

 I can help you with your store  and the issues is from the theme.

[teetrendz]

Hi,

What do i need to change in my theme?