Adding total order weight on default packing slip

[Kim93]

I've added {{ cart.total_weight | weight_with_unit }} unfortunately it reads 0.0oz. I've tried variant weight with unit but it won't communicate with my products set weight in OZ. 

This is my current code: 

{% if order.shipping_method != blank %}
{{ order.shipping_method.title }}
{{ shipping_method.handle }}
{{ order_total_items }}
{{ shipping_method.original_price}}
{{ cart.total_weight | weight_with_unit }}

{% else %}
No shipping required
{% endif %}

[alantabs]

Yeah, same problem. Seems I can call other variables but not weight!  I think the Shopify experts have changed something!!

I've tried {{product.weight}} {{ product.weight.grams}} {{product_varient.weight)) and all manner of combinations.... nothing works