What am I paying $450 for?

Ultra 200 laminate with heavier Ultra 400 at the wear points, and — the real differentiator — a major brand behind it: walk-in returns, a real warranty department, and retail stock instead of made-to-order queues. Whether that's worth $50-120 over the cottage equivalents is the whole purchase decision.

The Ultra laminates are genuinely waterproof rather than DWR-coated nylon, so the packbag won't wet out and gain a pound in the rain. A light liner for your sleeping gear remains cheap insurance, as with any pack that isn't a sealed dry bag.

Any first-generation issues to know about?

OutdoorGearLab notes design elements that still need refinement — this is Black Diamond's first swing at a category the cottage brands have iterated on for a decade. None of it is disqualifying, but you're an early adopter at a late-adopter price.

How does sizing work?

There's no adjustable torso — you pick a size, and the two removable stays shape from there. The saving grace is Black Diamond's retail presence: unlike the cottage packs, you can try one on loaded before buying, and returns are painless if the fit is wrong.

Is 45 L enough for a thru-hike?

For a dialed ultralight kit with 4-5 day food carries, yes. Long carries or bear-canister-plus-a-week scenarios get tight — the Bonfus Framus offers 13 L more at lower weight and price, which is the sharpest comparison against it.

Ultralight Pack

~$450

Black Diamond

Black Diamond Beta Light 45

Name: Black Diamond Beta Light 45
Brand: Black Diamond
Price: 450 USD
Availability: InStock

Black Diamond's entry into the ultralight wave pairs Ultra 200 and Ultra 400 laminates with two removable stays. It is the most expensive pack in this catalog's ultralight group, and the only one from a major climbing brand.

Approx. price

~$450

Capacity

45 L

Weight

1.98 lbs

Best For

Hikers wanting Ultra-fabric construction with a major brand's support behind it

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Specifications

What do these specs mean? →

Type

Ultralight Pack

Frame Type

Internal Frame

Capacity

45 L

Weight

1.98 lbs

Max Recommended Load

Not specified by the manufacturer

Torso Fit

See manufacturer sizing

Material

Ultra 200 and Ultra 400 with 4-way stretch mesh

Back Panel

2 removable stays with thin foam padding

Warranty

Manufacturer warranty; terms not published

Raincover Included

Fits BV500 Bear Canister

Features

Hipbelt Pockets

Pros

✓Combines Ultra 200 and heavier Ultra 400 so the tougher laminate sits where wear happens.
✓Two removable stays allow the pack to be stripped for lighter trips.
✓4-way stretch mesh holds external loads better than flat mesh.
✓Black Diamond's retail presence and support are far stronger than any cottage brand's.
✓31.7 oz is competitive with cottage packs of similar volume.
✓Ultra laminates are waterproof rather than merely water-resistant.
✓Easier to buy, return and warranty than a made-to-order cottage pack.
✓Hipbelt pockets included.

Cons

✗$450 is the most expensive ultralight pack here, by $50 over the Zpacks Arc Haul Ultra.
✗45 L is modest capacity for the price.
✗OutdoorGearLab notes design elements that still need refinement -- this is a first-generation product.
✗No published maximum load figure.
✗Ultra laminates are hard to field-repair.
✗No adjustable torso.
✗Black Diamond has far less ultralight pack heritage than the cottage brands it competes with.
✗Heavier than the Bonfus Framus while carrying 13 L less.

Common Questions

Compare the Black Diamond Beta Light 45

vs Black Diamond Distance 15 vs Zpacks Arc Zip Ultra 62

Related backpacks

Black Diamond Distance 15

4.7(11)

The Distance 15 is Black Diamond's fast-and-light vest pack, using a Dynex-blended shell for tear resistance at 12.7 oz. It is built for running and fast alpine days rather than general hiking, which is why it costs $200 for 15 L.

15 L0.79 lbs90% nylon with 10% Dynex shell

Weight

0.79 lbs

Capacity

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Frame

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Best for: Trail runners, skimo and fast alpine days

View details Check price

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The Arc Zip is the Arc Haul with front zip access, so the pack opens like a suitcase instead of only from the top. It keeps the tensioned carbon arc that lifts the pack off the back -- Zpacks' distinguishing feature -- at 23.9 oz for 62 L.

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Weight

1.49 lbs

Capacity

62 L

Frame

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Hyperlite Mountain Gear

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The Southwest 55 is Hyperlite Mountain Gear's flagship all-rounder, built in Maine from waterproof Dyneema composite with solid woven pockets for brush country. It's the pack that made white Dyneema the visual signature of modern thru-hiking.

55 L1.85 lbsWaterproof Dyneema

Weight

1.9 lbs

Capacity

55 L

Frame

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Ultralight Pack

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Hyperlite Mountain Gear Unbound 40

4.8(4)

The Unbound 40 is HMG's fast-and-light pack for dialed kits, with a stretch front pocket and bottom pocket aimed at hikers who move all day and camp minimally. At 40 liters it suits sub-10-lb base weights and shorter resupply intervals.

40 L1.72 lbsFast & Light

Weight

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Capacity

40 L

Frame

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Also in 55 L

Best for: Dialed ultralighters with sub-10-lb base weights and frequent resupplies

View details Hyperlite Mountain Gear

~$399

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Zpacks Arc Haul Ultra 60

The Arc Haul Ultra 60 is Zpacks' engineering statement: a 21.7-ounce pack whose carbon arc frame tensions a mesh panel off your back — the only true ventilation in the sub-1.5-lb class. Backpacker magazine named it the best ultralight pack of 2026.

60 L1.34 lbsVentilated Arc FrameVentilated back

Weight

1.32 lbs

Capacity

60 L

Frame

Internal Frame

Also in 40 L / 50 L / 70 L

Best for: Gram-counters who refuse to give up back ventilation

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~$399

Ultralight Pack

Hyperlite Mountain Gear

Hyperlite Mountain Gear Windrider 55

The Windrider is the Southwest with a large mesh front pocket in place of solid Dyneema, so wet gear can drain and dry. The 2025 overhaul moved the line to Dyneema Woven Composite and widened the shoulder straps.

55 L1.83 lbsDyneema Woven Composite with mesh front pocket

Weight

1.83 lbs

Capacity

55 L

Frame

Internal Frame

Also in 40 L / 70 L

Best for: Thru-hikers who want external stowage that drains

View details Hyperlite Mountain Gear

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