[nonameiguess]

This seems quite misleading. Generally, lighter gear costs more, for one thing. Second, going by the shopping list posted below about someone making it at just over 5 lbs, that works fine if you never go into high altitude or anywhere with very bad weather, but you're going to need more if you do. Also, it's listing "0.14 lbs" of food and water, which is obvious bullshit. That's only showing the weight of the containers. You can't actually live very long off of 10 grams of water and 20 calories of food and you're not going to get by not carrying any unless you're both following a river the entire way and you're a hell of a hunter, but also apparently not carrying any hunting equipment.

[metal_am]

When people talk about weight in this context, they really mean "base weight" not including consumables or worn clothing/shoes. The general rule of thumb is about 1lb/500g of food per day.