ThruDark Pinnacle 42L Backpack Review: A Durable Pack for Lightweight Multi-Day Trips

Introduction

The ThruDark Pinnacle 42L is the brand’s take on a do-it-all backpacking pack, and it lands in a useful middle ground. At 42 litres it is large enough for multi-day lightweight backpacking and for long day hikes with an overnight camp in between, and the same layout works for climbing trips where gear needs to be clipped on rather than packed away.

The pack measures 67 cm tall, 31 cm wide and 24 cm deep, and weighs 1.7 kg. It comes in olive green and black, is priced at around £190, and carries a five-year warranty. For a first entry into backpacks, the feature set reads as genuinely considered rather than a token effort.

Who This Product Is For

This is a pack for people who travel light on purpose. A 42 litre capacity suits summer backpacking, where the bulk of the load is a light shelter, a sleeping system and a few days of food, and it also works well as a larger day pack for hill walking and ridge routes.

Climbers get a second use case out of it. The lid and top of the pack are set up with claw hooks and generous adjustment so a rope can be carried over the top, and the front of the pack takes trekking poles or an ice axe.

It is not aimed at heavy load hauling. The manufacturer tests the pack up to 14 kg, but around 10 kg is where it feels settled, which lines up with lightweight multi-day trips rather than expedition-weight carries.

Main Strengths

Fabric and Weather Protection

The main body uses recycled Robic polyamide in a 210D weight, with a much thicker 840D ballistic fabric reinforcing the base where a pack takes the most abrasion. Both are treated for water repellency, so light rain beads off rather than soaking in.

There is also a zip-out rain cover tucked into the bottom of the pack. It is black, carries the brand emblem, and provides fully waterproof coverage when the weather turns properly wet. Having it built into the base means it cannot be left behind in a tent or a car.

Carry Comfort and Ventilation

The back system is one-size-fits-all with a useful range of adjustment, and the torso height is moved with hook-and-loop panels, so changing it takes seconds rather than tools. Load lifters and a top carrying strap let you fine-tune how the pack sits once it is loaded.

Padding is thick enough for the class without being excessive. The shoulder straps and hip belt are well padded, and the hip belt has breathable mesh plus pockets that are easy to reach on the move. The back panel combines mesh with foam cutouts to encourage airflow, which matters most on warm days and long climbs.

Features and Organisation

The layout is generous. A large stretch pocket on the front takes waterproofs or a wet shell, there are attachment points for trekking poles and an ice axe on both sides, and sleeping pad straps sit at the bottom. Twin side compression straps and deep mesh side pockets round out the outside.

Inside, there is a single large compartment with a hydration reservoir sleeve, a hose port that routes out of the main bag and through the lid, and a zippable mesh pocket on the sleeve for small items. The lid has a large pocket with a waterproof zipper plus a separate zip on the inside, and there is a set of SOS instructions stowed in the pack. Small details such as the sternum strap whistle and the metal fixings throughout give the impression of a pack that was designed rather than assembled.

Things to Consider Before Buying

The weight is reasonable but not remarkable. At 1.7 kg, the Pinnacle sits in the middle of the field for a 42 litre pack, and a good share of that mass lives in the thick back panel. Anyone chasing the lightest possible setup should factor that in, while accepting that thick fabrics and a full feature list inevitably add grams.

Fit is the other point worth checking. At 172 cm, the top edge of the back panel can press against the shoulder blades at first, although it eased as the padding softened with use. Torso length and shoulder shape vary, so it is worth loading the pack before committing to a long trip.

Finally, keep expectations on load in check. The pack is tested to 14 kg, but it behaves best around 10 kg, which is the right range for lightweight backpacking and less suitable for heavy winter loads.

Buying Advice

The Pinnacle 42L makes the most sense for someone who wants one durable, well-organised pack for lightweight multi-day trips, long day hikes and the occasional climbing outing. The recycled Robic body, the ballistic base and the integrated rain cover together suggest a pack that will hold up to regular use, and the five-year warranty backs that up.

If your trips stay around the 10 kg mark and you value thoughtful organisation over the lowest possible weight, this is a straightforward choice. If you regularly carry heavier loads, or you are sensitive to where a back panel contacts the shoulder blades, try it loaded before you buy, and consider whether a pack with a more adjustable harness would suit you better.

Conclusion

The ThruDark Pinnacle 42L is a well-made, good-looking backpack with a genuinely useful feature set and weather protection that has been proven in wet conditions. Its strengths are durable fabrics, a comfortable carry at realistic lightweight loads, and the kind of small detailing that usually only appears on more established packs. The trade-offs are modest: a middle-of-the-road weight and a back panel that may need a little breaking in for some body shapes. For lightweight backpacking and multi-day hill trips, it is a confident pick.