Calories per day for backpacking by exertion and trip length.
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Ultralight backpack 50-65LPack weight is the single lever that makes or breaks long trips. Sub-3lb packs exist at reasonable prices.
3-season sleeping bagA 20°F down sleeping bag covers most 3-season trips. Synthetic is heavier but works when wet.
Trekking poles (carbon)Poles reduce knee load on descents by a measurable amount. Carbon is lighter; aluminum is more durable.
Water filter (Sawyer Squeeze)Sawyer Squeeze filters to 0.1 micron and weighs 3 oz. The squeeze bag weakens over time — replace it.
Backpacking stove (canister)Canister stoves (Jetboil, MSR, BRS) are the simplest setup for solo or duo cooking. Bring a windscreen.
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