We began from the trailhead simply earlier than dawn — headlamps on, shifting at a power-hike tempo towards a spring ski goal deep in Colorado’s alpine. Inside an hour, the skis and skins have been deployed, however the tempo couldn’t let up.
Now within the alpine, we transitioned again to boots. I slid my skis into the loops of Millet’s new Trilogy Sky 25+ backpack, unhooked my ice axe, and saved shifting upward via a reasonably difficult rock scramble to the summit. Good timing. Or as near good as we’d get, given a wholesome wind.
Skis on, axe stowed, BOA cinched, I dropped in. B+ turns at greatest, however the day’s itinerary was dialed.
The speedy little backpack on my again performed an enormous position that day and on others prefer it. The Trilogy Sky 25+ is a pace mountaineering pack at coronary heart. However it was these multi-modal days the place I discovered its candy spot. And that received me pondering because the final high quality snow deteriorated into summer time: Might this pack thrive on dusty trails, distance path runs, and even light-and-fast overnights?
With ski season regrettably behind us, I got down to see for myself.
Briefly: Millet’s Sky 25+ is a mountaineering backpack mashed along with a working vest. It sports activities climbing instrument attachments, working vest shoulder straps, pockets for water flasks, and quantity ample for gentle mountain missions. The options that make it speedy within the mountains add versatility for different fast-moving pursuits, too. It’s a surprisingly efficient day hiker and even a fastpacking contender for people devoted to minimalist overnights. Simply be certain to fill the pack’s quantity for the most effective outcomes — it will get floppy when half crammed.
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Nice working efficiency -
Steadiness of sunshine weight and considerate options -
Adjustable match through BOA system
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Floppy when partially crammed -
No compression straps
Millet Trilogy Sky 25+ Backpack Evaluate

Millet isn’t a younger model at 104 years outdated. However it’s lately making a comeback within the U.S. after a short hiatus. That resurgence is accompanied by its new Alpine Trilogy lineup impressed by the basic Alps trio problem — North Face ascents of the Grandes Jorasses, Cervin (aka Matterhorn), and the Eiger, first accomplished by Christophe Revenue in 1985 in 24 hours.
The Trilogy collection is a collection of gear designed for alpine challenges. Thankfully for all these customers like me who don’t see themselves pace climbing three of essentially the most difficult faces on the planet anytime quickly, the Trilogy Sky 25+ is sort of versatile outdoors of top-level alpinism.
Backpack Structure


The Trilogy Sky 25+ is an easy basis laced with technical options in a lightweight bundle. The principle cloth is extremely sturdy 70D nylon with 300D Dyneema overlays for added power and tear resistance. The flamboyant cloth makes the pack exceptionally powerful, however it’s nonetheless simply 660g. It’s additionally the supply of the comparatively excessive $300 price ticket.
Major Physique
The essential pack physique has primarily three pockets: one huge essential pocket with a cinch closure, an inside water bladder pocket, and an outer Dyneema stretch drop-in pocket. There’s additionally an inside Velcro pouch above the bladder sleeve. It’s an honest stash spot for small gadgets, however it’s additionally liable to pulling out when digging via layers.
Shoulder Straps
The shoulder straps are the place the Trilogy Sky 25+ diverges from a typical backpack and slips into working vest territory. It matches like a working vest (extra on that beneath). And in typical trend, they arrive with tender flask holsters (flasks not included) and roomy snack pockets on every strap below the armpits.
Outer Entry & Storage
The wearer’s proper flank has a facet entry zipper that exposes an enormous opening into the meat of the pack. I discovered it tremendous useful for accessing layers, my buried first-aid package, and different necessities packed towards the underside. It’s nothing significantly progressive. However in my view, all top-loading packs ought to have one.
I rapidly stowed the lengthy piece of wire that zigzags down the opposite facet of the pack via anchor factors. Functionally, it permits for extra storage on the surface of the pack — a foam sleeping pad, trekking poles, a rain jacket, and different comparatively light-weight gadgets come to thoughts. I like that the wire has its personal storage slot as a result of I discovered myself getting tangled within the unfastened string when it wasn’t storing something.
Mountaineering Options


After all, Millet doesn’t shed the crucial mountaineering options that you just want for routes within the Alps and past. The twin ice instrument carry is safe and elegantly built-in — perhaps too elegantly. I virtually missed the shaft loops on first inspection. I like such a ice instrument carry. It’s safe, but it’s straightforward to seize an ice instrument when you’re sporting the pack.
A really lengthy high strap secures each the pack’s lid and a rope. It will also be used as the highest attachment level for diagonal ski carry, which I’ll admit took me some time to determine. However as soon as it’s attached, the diagonal ski carry is stable sufficient and may accommodate quite a lot of ski shapes.
Diagonal carry is well my favourite ski carry choice, however it’s price noting that the Sky 25+ doesn’t accommodate vertical or A-frame ski carry choices.
The stretchy outer pocket is a good place to retailer crampons in relative safety so that you just don’t need to jam them into crevices round your favourite puffy contained in the pack. Equally, that pocket was an incredible place to stash skins to maintain the wetness out of the principle pocket.
The Sky 25+ doesn’t host any devoted avalanche instrument pocket or inside loops for a shovel and probe. I ended up stashing my shovel deal with and probe within the bladder pocket in order that they stayed up towards the again panel and slid the shovel blade towards the wall of the pack. That’s usually the case with devoted mountaineering packs, so no surprises right here.
Match for Motion


It was apparent from the primary time I put it on — the Trilogy Sky 25+ matches snugly on my higher physique. At 6’1” and 195 kilos, I wouldn’t go smaller than the L/XL model I’ve been sporting. Even nonetheless, I couldn’t shut the decrease chest strap within the manufacturing unit setting. However as a result of there are simply adjustable daisy chain ladders on the shoulder straps, I bumped them up towards the highest half of the straps.
A Sneaky BOA System
It took me a couple of days of sporting the Sky 25+ earlier than I absolutely understood the sneaky BOA match adjustment dial. It’s situated below a magnetic hatch on the backside of the pack. The dial, which is accessible whereas sporting the pack, tightens the shoulder straps the place they be a part of on the lumbar.
I’ve by no means seen a BOA dial used like this earlier than. Whereas it felt gimmicky at first, I got here round. It’s surprisingly efficient, if barely over-engineered. I’ve discovered it to be a crucial pillar on which the pack’s versatility stands.
With only a T-shirt, I crank the BOA dial right down to its tightest restrict for a comfortable, bounce-free match. However the second I began including layers for chillier actions, like a midlayer and a shell, I needed to open the dial to launch the strain and crank within the compression for simply the best match.
Is there a much less technical solution to design a tightening match system like this? Most positively. However the system on this pack is straightforward to regulate on the fly. It gives a hard and fast snugness with none bounce or elasticity.
Weight Carry
I used to be impressed by how properly the Sky 25+ carried weight, provided that it lacks a stiff body. As I backpacked with skis on my again, the load felt properly distributed over my shoulders and again.
That’s vital as a result of, in contrast to a conventional backpack, it doesn’t have a waistbelt to help the pack’s weight. Most significantly, the pack wasn’t bouncy once I was shifting rapidly.
Sky 25+ Versatility


After a couple of visits to the French Alps, I get how mountaineers over there can get away with such small quantity backpacks. There are trams, trains, and excessive mountain shelters everywhere. It’s heaven for quick and light-weight mountaineering. Mountaineers and skiers don’t usually want to hold a tent or a sleeping bag for in a single day itineraries.
In Colorado’s backcountry, the place lengthy approaches are extra the norm, a small alpine pack like this sees broader use, usually as a mountain climbing or scrambling pack. Might it’s an in a single day pack? Certain. Particularly for minimalist fastpacking masochists who shun consolation and heat in trade for pace and distance. However don’t overlook to chop your toothbrush in half to avoid wasting house.
From the outset, I couldn’t assist however discover that the Sky 25+ is sort of much like Outside Vitals’ Skyline Fastpack and MEC’s Serratus Tempo UL 25 packs. Each of these packs are designed round fastpacking, or a mix of backpacking and distance working.
The form and have set share the crucial options — working vest straps, tender flask pockets, ~25-plus-liter capability, and so on. So for the sake of comparability, I packed up the Sky 25+ with my in a single day package and bounded into the woods.
As with carrying skis, I used to be impressed with the consolation and poise with which the Sky+ carried the load of minimalist light-weight in a single day gear. Though there’s no elasticity constructed into the carrying system in favor of a sturdy platform, it wasn’t uncomfortable. I didn’t discover any pronounced chafing or match points after a number of miles.
Millet Trilogy Sky 25+ Backpack: Limitations


The Sky+ is a worthy contender with devoted fastpacks. The first distinction is that the Sky 25+ doesn’t sport compression straps to cinch down the contents or compress any further house within the pack. That isn’t an enormous deal when it’s packed to the max with gear. However when it’s half full, it’s just a little bit floppy.
However it is smart that Millet wouldn’t embody outer straps on this pack, provided that it’s designed for alpine climbing. It wants to have the ability to squeeze via rocky cracks and never get snagged in rope programs.
As a result of the principle pocket doesn’t cinch down, it wasn’t nice for middle-distance backcountry path working when it is advisable to pack simply an additional layer or two. The identical goes for mountain biking. It was just a bit too floppy for fast-moving, much less gear-intensive pursuits. A devoted working vest continues to be the most suitable choice there.
So, again to its core features; the Sky 25+ is very well poised as a speedy hiker, even for adventures that don’t find yourself on vertical rock or ice.
Millet Trilogy Sky 25+ Backpack: Conclusion


The Millet Trilogy Sky 25+ is an oddball backpack. It’s half working vest, half mountaineering pack. However in the best circumstances, this pack works. It’s not going to interchange your every day path runner vest or your ultralight backpacking bag, however it does what it claims it should, and extra in good fashion.
Aside from alpinists and speedy hikers, the principle customers that can match with this pack are gentle and quick backcountry skiers. It has the essential options for all three sports activities — ski carry, dialed match, gear attachments, and simply accessible water. It should even deal with a fastpacking in a single day if you happen to’ve received the ultra-compact backpacking gear to fill it. You’ll be able to really feel safe understanding it has you coated if you end up pace climbing the Eiger, too.