The three pieces of gear that determine most of your pack weight
I remember spending hours trying to shave a few ounces off small items in my backpack—switching spoons, cutting labels off gear, and obsessing over tiny details. Then an experienced backpacker pointed out that my tent alone weighed more than several of my other items combined. That's when I learned about the Big 3.
In backpacking, the Big 3 are the three heaviest pieces of gear you carry. If you want a lighter pack, these are the first things to focus on.
The Short Answer
The Big 3 are:
- Backpack
- Shelter (tent, tarp, or hammock)
- Sleep system (usually the sleeping bag or quilt)
Together, they often account for 50–70% of your base pack weight.
1. Backpack
Your backpack carries everything else, so it's naturally one of the heaviest items.
A typical backpack weighs:
- Traditional packs: 2–3 kg (4–7 lb)
- Lightweight packs: 0.5–1.5 kg (1–3 lb)
A common mistake is buying a large, heavy backpack before deciding what gear will go inside it.
I’ve found it's usually better to choose your gear first and then select a backpack that fits it.
2. Shelter
Your shelter includes:
- Tent
- Tarp
- Hammock setup
This is often the single heaviest item in a beginner's pack.
Typical weights:
- Traditional tent: 2–4 kg (4–9 lb)
- Lightweight tent: 1–2 kg (2–4 lb)
A lighter shelter can dramatically reduce overall pack weight.
3. Sleep System
This usually refers to:
- Sleeping bag or quilt
- Sometimes the sleeping pad is included as part of the sleep system
Weight depends heavily on:
- Temperature rating
- Materials
- Season
A quality sleeping bag often weighs:
- 0.7–1.5 kg (1.5–3 lb)
Why The Big 3 Matter
If you reduce:
- Backpack weight by 500 g
- Shelter weight by 1 kg
- Sleep system weight by 500 g
You may save 2 kg (4+ lb) overall.
That's often more effective than trimming weight from dozens of smaller items.
What Is Base Weight?
Backpackers often discuss:
Base Weight = Everything Except
- Food
- Water
- Fuel
The Big 3 make up a large portion of this number.
Why Beginners Focus On The Wrong Gear
New backpackers often spend money on:
- Gadgets
- Tools
- Accessories
Meanwhile:
- Heavy tent
- Heavy backpack
- Heavy sleeping bag
Remain unchanged.
That's why experienced hikers usually evaluate the Big 3 first.
Three Ways To Reduce Big 3 Weight
1. Choose A Lighter Shelter
Often the biggest opportunity.
2. Upgrade Your Sleep System
Especially older sleeping bags.
3. Match Your Backpack To Your Gear
A smaller, lighter load often allows a lighter backpack.
A Quick Aside About Cost
The Big 3 are usually the most expensive backpacking items. Many hikers upgrade them gradually over several years rather than all at once.
My Personal Takeaway
The Big 3 in backpacking are your backpack, shelter, and sleep system. These items dominate your pack weight and have the biggest impact on comfort and efficiency on the trail. If you're looking to make backpacking easier, start with the Big 3—they offer the greatest weight savings and the biggest improvements in overall hiking comfort.