Here's a comparison of what I take for a night.
20 ltr eurohike day pack / Vershmeshok.
1 ltr waterbottle / 1 ltr wide neck waterbottle.
Jetboil / Butane pocket stove.
British army jungle sleeping bag / 4 seasons down bag.
Snugpak SF Bivi Bag / N/A
3/4 self inflating roll mat / N/A
Jerven original / Lidl poncho.
Victorinox Rangergrip 78 / Case camper knife.
Down jacket / Swanndri jacket.
Wool hat / Wool hat.
Gloves / Gloves
Head torch / N/A
Thermal top n bottoms / Merino wool top/bottom, in pack.
Food-coffee, dried pasta meal, easyoats /Granola, dried mango loose tea.
Water filter / Water filter.
Small first aid kit / First aid kit.
Lightweight 3 x 3 m tarp.
I've been away for longer with this, when I know I can buy food on the way. ( Speyside Way) The tarp is new to me. Previously I used an Ultima Pea Pod (carbon fibre) which I had for over 30 years. I tend to travel most of the day, so the butane stove is for convenience. A pocket full of wood pellets works reasonably well for a brew up on a twig stove, as does filling the stove with twigs cut to approx 1" lengths ( 25mm) , once it's going, a cheap set of bypass secateurs does a quick job of this, if you want to carry some extra weight. For me going lightweight is to keep things simple and hassle free, which it does.