diff --git a/app/components/dsfr/callout_component.rb b/app/components/dsfr/callout_component.rb
index da0160990..6a4e83c57 100644
--- a/app/components/dsfr/callout_component.rb
+++ b/app/components/dsfr/callout_component.rb
@@ -3,16 +3,17 @@ class Dsfr::CalloutComponent < ApplicationComponent
   renders_one :body
   renders_one :bottom
 
-  attr_reader :title, :theme, :icon
+  attr_reader :title, :theme, :icon, :extra_class_names
 
-  def initialize(title:, theme: :info, icon: nil)
+  def initialize(title:, theme: :info, icon: nil, extra_class_names: nil)
     @title = title
     @theme = theme
     @icon = icon
+    @extra_class_names = extra_class_names
   end
 
   def callout_class
-    ["fr-callout", theme_class, icon]
+    ["fr-callout", theme_class, icon, extra_class_names].compact.flatten
   end
 
   private
diff --git a/app/components/editable_champ/explication_component/explication_component.html.haml b/app/components/editable_champ/explication_component/explication_component.html.haml
index 9fbc82439..2ed40f2be 100644
--- a/app/components/editable_champ/explication_component/explication_component.html.haml
+++ b/app/components/editable_champ/explication_component/explication_component.html.haml
@@ -1,3 +1,11 @@
-%h2.explication-libelle= @champ.libelle
-.explication
-  = string_to_html(@champ.description)
+= render Dsfr::CalloutComponent.new(title: @champ.libelle, extra_class_names: ['fr-mb-2w', 'fr-callout--blue-cumulus']) do |c|
+  - c.with_body do
+
+    = string_to_html(@champ.description)
+
+    - if @champ.collapsible_explanation_enabled? && @champ.collapsible_explanation_text.present?
+      %div
+        %p.fr-my-2w
+          %button{type: "button", "aria-controls" => "champs-text-#{@champ.id}", "aria-expanded" => "false", href: "#champs-text-#{@champ.id}"} Lire plus
+        %p.fr-collapse{ id: "champs-text-#{@champ.id}"}
+          = @champ.collapsible_explanation_text
diff --git a/app/models/champ.rb b/app/models/champ.rb
index 5ee7948cf..a4a16dc09 100644
--- a/app/models/champ.rb
+++ b/app/models/champ.rb
@@ -42,8 +42,9 @@ class Champ < ApplicationRecord
     :drop_down_list_enabled_non_empty_options,
     :drop_down_secondary_libelle,
     :drop_down_secondary_description,
-    :collapsible_explanation_text,
     :collapsible_explanation_enabled,
+    :collapsible_explanation_enabled?,
+    :collapsible_explanation_text,
     :exclude_from_export?,
     :exclude_from_view?,
     :repetition?,