The Icon Shopify Theme is conversion focused and packed with wide array of features that empowers Shopify Store owners to create unique & compelling shopping experiences with ease. Sticky Header, Sticky Sidebar, Parallax Scrolling Images and much more! Take a look at the full details: http://goo.gl/Byjv2g
For further performance metrics on this theme:
Keep menus fixed to the top of your page as you scroll down.
Showcase multiple product or brand images on your home page.
Feature product images in a large, multi-column drop-down menu.
Share your latest Instagram posts in a full-width feed.
View product details in a popup so customers don't have to leave their current page.
Create an animated depth effect as you scroll down the page.