Best theme for very simple ecommerce store?

[DigitalChomp]

I have a client who has an ecommerce store but only 3 products. I just started working with her. She is using a theme right now that doesn't work great. I am looking for a friendly theme, with a very streamlined checkout flow, the ability to show product details BELOW the add to cart button, sizable slider (s/m/l) and custom theme pages. We are using Atlantic right now but I feel there is much to be desired with UI/UX, we are at www.safetraveslkit.com 

Any advice???

Gina

[dmwwebartisan]

@DigitalChomp 

Please check following URL for free theme 

https://themes.shopify.com/themes?sort_by=most_recent&price%5B%5D=free