loop through shopify tags to see if a product has a tag

shopify tag loop

{% comment %}this tag loop looks for tag border in the product tags - if it finds it then it adds a class="border_this"{% endcomment %}
{% comment %} break is used to escape the loop - more efficient code {% endcomment %}

{% for tag in product.tags %}
  {% if tag contains 'border' %}
    class="border_this"
    {% break %}
  {% endif %}
{% endfor %}

Thank you, this really helped!