Our detectives are back with the following intel on this WordPress site
Unfortunately we could not identify the theme this site is using.
We could identify 6 plugins (there might be more) - Contact Form 7 , Smash Balloon Social Post Feed , Max Mega Menu , Social Media Widget , Sticky Menu, Sticky Header (or anything!) on Scroll and Yoast SEO
Sticky Menu or Sticky Header lets you stick any element at the top of the screen when you scroll, or create a floating menu.