Bonfus Maxus 80L Review

Overview

The Maxus 80L is Bonfus’s answer to a real gap in the ultralight market: a genuinely large-capacity, load-hauling pack that doesn’t weigh what a traditional 80L expedition bag weighs. Hikers needing a large backpack have long had to settle for traditional models that often weigh over three and a half kilos, which has bothered Bonfus, since many hikers carry large gear and don’t need extra weight, and modern lightweight options for packrafting or winter use have been scarce. This is a pack for people hauling bear canisters, packrafting kit, winter gear, or multi-week food carries — not a standard 2-3 day thru-hiking setup.

Key Specs

Spec	Value
Weight	1,021 g (2.25 lb)
Volume	80 L
Frame material	7075 aluminum, 64 cm frame length
Main fabric	Ultra 200X (130 gsm)
Bottom fabric	Ultra 400X (168 gsm)
Hipbelt/shoulder fabric	UltraGrid 210D
Hipbelt foam	25 mm total (12.5 mm belt + 12.5 mm removable lumbar pad)
Torso adjustment	Yes
Price	~$389

Performance

Capacity and load carrying. At 80 liters and just over 1 kg, the Maxus is doing something genuinely unusual — most packs in this volume range from traditional brands land closer to 1.5-2 kg. One Backpacking Light forum user, coming from a rotation of frameless packs and a Hyperlite 55, reported that “I just tried with 28 lbs and it carries great.” That same user’s real motivation for buying it lines up with what Bonfus is targeting: the ability to fit a bear canister without any issues, which was always a problem with packs like the HMG 55 that carries well otherwise. They also noted the HMG 70 alternative wasn’t a great fit either, since “the compression sucks and bag is too deep and away from your back,” and found SWD packs too narrow for a bear can in the 50L size.

Hipbelt. Bonfus put real engineering into the belt here. The hipbelt features high-density foam, 12.5mm thick with balanced rigidity for load transfer, plus an additional 12.5mm removable foam piece in the lumbar area for a total of 25mm of padding, designed to lock the pack in place and prevent slippage under heavy loads while accommodating different body shapes. The direct-to-frame attachment matters more than it sounds — the hipbelt and shoulder straps attach directly to the high-strength 7075 aluminum frame, allowing a secure and stable connection. In practice, that’s the difference between a hipbelt that just sits on the bag versus one that actually transfers weight off your shoulders when you’re carrying 25-30+ lbs. One user who directly compared it to a Six Moon Designs Long Haul called the belts roughly comparable, though they gave the edge to SWD’s shoulder straps, saying “the shoulder straps of the SWD are heavenly soft,” while noting “Bonfus shoulder straps do the job – no complaints.” That’s a fair summary — nothing plush, but functional.

Fabric and durability. The build uses Ultra 200X on the body and a beefier Ultra 400X on the bottom where abrasion is worst — a sensible pairing given the fabric is strong, lightweight, and waterproof to 20,000mm, and performs in both sub-zero and tropical climates. I haven’t seen long-term durability data from multiple owners yet (this is a small cottage brand with a thin review base), so treat the fabric’s field longevity as still unproven at scale, even if the spec sheet is solid.

External attachment and versatility. This is where the Maxus differentiates itself from a typical Dyneema 60-70L pack. The backpack excels in carrying large items, making it easy to include awkwardly shaped gear from PFDs to bulky tents to snowshoes. Bonfus also sells an accessory ecosystem — optional shoulder pouches and hipbelt pockets integrate via dedicated webbing loops, and the pack is compatible with a packing cube, food bags, and dry bags for a modular organization system.

Setup and first impressions. One quirk worth flagging before you buy: due to the shipping bulk created by its frame and hipbelt, the Maxus 80L backpack may arrive unassembled. You’ll need to thread the aluminum stays into the shoulder strap sleeves and top webbing channels yourself, and Bonfus warns it’s normal to feel resistance sliding the strap around the bar and for the webbing to feel tight at first since it’s stiff when new, but it will gradually adapt to the bar’s shape. It’s a 15-minute job with the included instructions, but it’s not a pull-out-of-the-box-and-go pack the way most name-brand ULA or Osprey packs are.

Pros & Cons

Pros

• Genuinely rare combination: 80L of capacity and load-hauling hardware at ~1,021g — half the weight of a comparable traditional expedition pack
• Well-engineered hipbelt with removable lumbar foam and direct-to-frame attachment for real weight transfer under heavy loads
• Waterproof Ultra fabric with a reinforced bottom panel suited to demanding, wet, or abrasive conditions
• Extensive external attachment points make it genuinely useful for packrafting, winter mountaineering, and hunting loads, not just backpacking
• Modular accessory system (hipbelt pockets, shoulder pouches, packing cubes) sold separately

Cons

• Ships partially unassembled — you’re threading stays and breaking in stiff webbing yourself on day one
• Shoulder strap padding is functional but not plush; competitors like Six Moon Designs edge it out on shoulder comfort
• Small cottage brand out of Italy — expect longer shipping times, and long-term durability data is still thin
• 80L is overkill for most 3-season backpacking; this pack only makes sense if you actually need the volume (bear can, winter gear, packraft, extended food carries)
• Limited independent review coverage compared to established ultralight brands, so buying involves more leap-of-faith than a Durston or ULA purchase

Who Should Buy This

The Maxus 80L makes sense for a fairly specific user: someone who needs to carry genuinely bulky loads — a bear canister plus five-plus days of food, packrafting gear, winter camping equipment, or hunting supplies — but doesn’t want to pay the weight penalty of a traditional load-hauling pack. If your trips top out around 3 days with a bear can optional, you’re better served by something in the 50-60L range. But if you’re the person who’s been cramming a bear can into a Hyperlite 55 and cursing about it, this is built for exactly that problem.

Verdict

Bonfus has clearly identified and solved a real niche: a sub-2.5 lb pack that can actually hold and haul 80 liters of heavy, bulky gear. The hipbelt engineering and fabric choices back up the marketing, and the early user feedback on load-carrying is genuinely positive. The tradeoffs — assembly required, shoulder strap comfort that’s good-not-great, and a thin independent review base since this is a small Italian cottage brand — keep it from being an easy 9 or 10, but for the specific hiker who needs this much volume without a heavy pack, I’d rate it a 7.5/10.