Buy more up

[kingsport]

Hello, can someone help me telling what up is this? I am very interesed in it and i can't find it :

 It's a buy more up but it looks realy realy good > store link: https://beforest.fr/

thank you!

[w3trends]

Looks like their using Infinite Options with some custom styles and maybe custom functions:

https://apps.shopify.com/custom-options?surface_detail=infinite+options&surface_inter_position=1&sur...

We also offer a Custom Product Options app that you could use to do this

You can see the listing and an example of the app working at the following links:

Shopify Listing

Example Store