Forty litres is the most useful size nobody buys first
Most people buy a 20L daypack, then eventually a 60L expedition bag, and then discover that about eighty percent of their actual trips sit somewhere in between. Long day hike with full weather kit. Overnight in a hut. A weekend where you're not carrying a tent. That's 40L territory, and it's the pack I reach for more than any other.
The Maelstrom covers that window properly. Forty litres of day-to-weekend capacity, hydration compatibility for a reservoir, and multiple quick-access pockets so the things you need while moving aren't buried under the things you don't. Trekking-pole attachment for the climbs where you want your hands, and compression straps so a light load rides tight instead of swaying.
Carry-wise, it does the fundamentals in the right order. Supportive waist strap to move weight onto your hips, ventilated padded back to keep some air behind you on a warm ascent. Field note from years of fitting packs to people: before you blame a pack for being uncomfortable, load it, tighten the hip belt first, then the shoulders, then the load lifters. Most "bad" packs are just badly loaded ones.
Weather protection is sensible ā a water-resistant ripstop shell for the light stuff, and an included rain cover for when it stops being light. And the feature-to-price ratio is the genuinely notable thing here. This pack does the job of gear costing three times more, and it does it well enough that if you're building a kit on a real-world budget, this is the smart place to spend. Get it, fill the gap in your setup, and go use the weekend.