VOLUME
38L (30L internal, 8L external)
PACK WEIGHT (Medium)
415g | 14.6oz
CARRY LOAD
HEIGHT (unrolled)
73cm | 28.7in
ULTRALIGHT WITHOUT COMPROMISE
The Iterus 38L is the dream pack for minimalist ultralight thru-hikers and backpackers, built for long and tough adventures. With a removable 1" webbing belt, functional 4-point compression cords to significantly reduce pack volume, comfortable 11mm thick shoulder straps padded with EVA-foam, and the most advanced fabrics on earth, the Iterus is your trusted lightweight companion for the highest peaks.
This updated version of the pack is crafted from ultralight, durable fabrics with taped seams, it’s built for long adventures. With durable, spacious side pockets, frameless with removable shock cords along the back panel to attach a foam pad (not included), and single webbing straps for carrying extra gear over the roll top closure, the Iterus 38L delivers versatile storage, ergonomic lightweight comfort, and trail-ready performance.
This updated version of the pack is crafted from ultralight, durable fabrics with taped seams, it’s built for long adventures. With durable, spacious side pockets, frameless with removable shock cords along the back panel to attach a foam pad (not included), and single webbing straps for carrying extra gear over the roll top closure, the Iterus 38L delivers versatile storage, ergonomic lightweight comfort, and trail-ready performance.
THE RIGHT FEATURES
The Iterus 38L is designed for multi-day trips for minimalist adventurers looking for lower volume and ultralight base weights. The pack is frameless with the option to attach your own back foam pad for fast and light trips requiring the lowest possible weight.
Plush, breathable shoulder straps and a removable webbing belt with two attachment loops to enhance all-day comfort, while generous storage—including a spacious, big stretchy spandex/nylon front mesh pocket, durable side pockets with double layer elastic at the hem to hold your gear firmly in place, single webbing straps for carrying extra gear over roll top closure, and a sewn-in shoulder mesh stretch pocket —keeps gear accessible. Built from durable, lightweight Ultra fabrics with modular attachment options and an integrated ice axe loop, the Iterus 38L balances durability and stability all while keeping the pack weight below 380 g (not including the webbing belt +35g).
Plush, breathable shoulder straps and a removable webbing belt with two attachment loops to enhance all-day comfort, while generous storage—including a spacious, big stretchy spandex/nylon front mesh pocket, durable side pockets with double layer elastic at the hem to hold your gear firmly in place, single webbing straps for carrying extra gear over roll top closure, and a sewn-in shoulder mesh stretch pocket —keeps gear accessible. Built from durable, lightweight Ultra fabrics with modular attachment options and an integrated ice axe loop, the Iterus 38L balances durability and stability all while keeping the pack weight below 380 g (not including the webbing belt +35g).
- A minimalist frameless design engineered for experienced ultralight hikers, offering a direct and stable carry that moves naturally with your body on technical terrain.
- Ultralight weight-to-volume ratio, stripping away unnecessary hardware to achieve a base weight of only 380g (13.4oz) while maintaining a generous 38L total capacity.
- Integrated snack & trash pocket, featuring a bottom-access stretch mesh pocket that allows you to reach essentials on the go without breaking your stride or removing the pack.
- Comfort-focused contact points, including 11mm EVA-padded shoulder straps and a breathable 3D spacer mesh back panel for a soft, cushioned feel against the torso.
- High-tenacity fabric construction, utilizing Ultra 200X for the main body and a reinforced Ultra 400X bottom panel to handle abrasion from granite, brush, and frequent ground contact.
- Adaptable compression & storage, with a versatile side-cord compression system, a massive UltraPE stretch front pocket, and a roll-top closure that scales down for smaller weekend loads.
CUSTOMIZED MODULARITY
Optional
shoulder pouches and
hipbelt pockets (sold separately) integrate seamlessly via dedicated webbing loops on the shoulder straps, allowing you to customize your carry for quick-access essentials. The Iterus 38L is also fully compatible with accessories such as the
Large Packing Cube,
Food Bags, and
Dry Bags, creating a modular system that maximizes organization, efficiency, and adaptability on the trail.
PROUDLY MADE BY HAND
Bonfus develops, tests, and produces its gear in-house, maintaining full control over every stage of the process. This hands-on approach ensures that Bonfus stands behind every product it makes and delivers consistently high-quality gear to its customers.
Each pack is meticulously inspected by Bonfus co-founder Stefania before shipment – a level of quality control that is unmatched even among cottage ultralight brands.
Each pack is meticulously inspected by Bonfus co-founder Stefania before shipment – a level of quality control that is unmatched even among cottage ultralight brands.
| SIZING | ONE SIZE | UPPER LOOP | LOWER LOOP |
|---|---|---|---|
| Global Spec | Standard Fit | Tall Fit | |
| Torso Length | Adjustable Dual-Loop | Up to 20 in 50 cm |
Up to 22 in 55 cm |
| Included Webbing Belt | Fits up to 47 in 120 cm |
- | - |
| Pack Weight* | 13.4 oz 380 g |
- | - |
*Note on hip belt sizing: measurements refer to hip girth at the height of the iliac crest (not waist girth, which tends to be smaller)
Choosing the correct torso size will make your pack sit more comfortably and adapt to your back.
For guidance about how to measure your torso length please refer to our guide.
| SPECS | |
|---|---|
| Volume | 38L (30L internal, 8L external pockets) |
| Suggested Carry Load | Up to 6-7kg (13.2-15.4lbs) without hip belts Up to 7-8kg (17.6-19.8lbs) with removable webbing belt (included) Up to 9-10kg (19.8-22lbs) with padded removable hip belt (not included) |
| Taped Seams |
|
| Ice Axe Loop |
|
| Pockets | Two large side pockets Spacious stretch front mesh pocket One sewn-in shoulder stretch mesh pocket Bottom pocket |
| Unrolled Height | 28.7 in 73 cm |
| Average Circumference | 33.4 in 85 cm | Drainage Holes | At side pockets |
| MATERIALS | |
|---|---|
| Main Body | Ultra 200X for cutting-edge durability and performance |
| Pack Bottom | Reinforced Ultra 400X for abrasion resistance |
| Shoulder Straps / Side Pockets | UltraGrid Fabric |
ADDITIONAL INFO
- Ultra 200X (130gsm | 3.85oz/sqy): Probably the most advanced pack fabric on the market. It features woven 200D UHMWPE fibers. With only a slight weight increase compared to DCF2.92, Ultra 200X offers 3× higher tear strength, 3× higher UHMWPE fiber content, and 7× the abrasion resistance. The fabric backing consists of a 0.75 mil recycled polyester film with an X-grid, making it extremely waterproof. This fabric is used as the main pack material.
- Ultra 400X (168gsm | 4.95oz/sqy): Constructed with woven 400D UHMWPE fibers and backed with a 0.75 mil recycled polyester film and X-grid for excellent waterproofing. It provides roughly twice the abrasion resistance of Ultra 200X and is used in the bottom section of the pack.
- UltraGrid (146gsm | 4.3oz/sqy): UltraGrid is woven with 210d recycled nylon yarn made from pre-consumer industrial waste. A double 5 mm 200d Ultragrid ripstop delivers exceptional tear strength and visual impact. The fabric is treated with a C0 DWR finish that contains no fluorocarbons (PFC-free) and is finished with a waterproof 1500 mm PU backing. Bluesign® approved.
Choosing the correct torso size will make your pack sit more comfortably and adapt to your back. For guidance about how to measure your torso length please refer to our guide below.
Generally, most people will have a torso length in the range 46-54cm (18″-22″).
If you fall into two pack sizes, choose the larger size. A pack that is too small will transfer too much weight to your shoulders.
More from Bonfus
View all
Recently viewed