New colors and a slightly refined fit for 2021.
Like a Jackalope, the Jackaloft brings the best of two worlds together in a single ultralight insulation layer. The ‘Jack’ comes from ‘Jacket,’ while the ‘Loft’ comes from the body-mapped, fully synthetic, PrimaLoft® Gold insulation. It’s super low profile, yet it’s also incredibly warm and highly packable, and it preserves its insulating properties even when compressed under body armor. We designed it specifically for layering under an outer jacket and armor on the bike, but it works just as well around camp or in town.
Don’t let its humble silhouette fool you, the Jackaloft insulated shirt-jack punches way above its weight. Ultralight, highly compressible and super warm, the Jackaloft uses fully synthetic PrimaLoft® Gold insulation with Cross Core technology. This high-tech insulation combines PrimaLoft's top of the line fibers with aerogel (google ‘aerogel’ for more info!), to provide 52% more warmth than the same weight of PrimaLoft® Gold alone. This enables enhanced warmth and decreased weight, resulting in a highly packable, ultralight garment.
Originally developed by NASA, aerogel is composed of more than 95% air, and is the lightest solid material known to man. It’s also one of the most effective insulation materials ever made. When integrated directly into synthetic fibers, aerogel dramatically enhances warming. This isn’t just something you see in charts and stats, you’ll immediately feel the effects yourself when you wear the Jackaloft. On a moderately cool evening, you might be surprised to find yourself leaving the Jackaloft partially unzipped, which is surprising given its size and weight. We packed as much warmth as we possibly could into this very small package.
The size of the Jackaloft is important not only on warm days when it’s packed away on the bike, but also on cold days when you’re wearing it under armor. With insulation, body armor, and an outer shell, one of the biggest challenges we face is how to layer-up without making our riding kits so bulky that we can’t move around. Another challenge is that body armor, a shell, and constant wind pressure on a non-windscreened enduro bike can compress your insulating layer, removing its loft and reducing warmth, similar to what happens on the bottom half of a down sleeping bag when you lay in it. That’s why the Jackaloft uses synthetic insulation rather than goose down: synthetic fibers will maintain their loft even under pressure. That will keep you warmer on the bike.
We styled the Jackaloft as a shirt-jack for a very practical reason: we want this to be the only insulating layer you need on your trip. If we can disguise a highly technical insulated riding layer as a badass garment that you’re stoked to wear around camp or on your next Tinder date, then that’s one less thing you have to pack. Wear it everywhere.
*Model is 1.8m tall, 79kg, and wearing a size L jacket
Ethically produced in Bangladesh
Nice light weight warm jacket very happy with it
Very nice product. I wear a large and had to size up to XL as it is very slim fit. Works well under armor. Did a little ride in 50s weather in Texas and felt plenty warm. It could use a little more room in shoulders and at hips.
It's easy. I still have the first set of backcountry panniers I bought in 2016 and the same 40l duffle. I go through bikes faster than I go through the gear. It hold my supplies, keeps it dry and its protected my bikes from damage when i can't keep my tires on the ground. I recently received a Mosko jersey (topo print.) These feel so mutch better on your skin than any others. Fit runs a little small go up a size. Simple right.
A month ago I bought the mid layer in copper. I wear it almost every day on and off the job as well as on and off the bike. Followed the jersey sizing rule and went up one size. Im 5'10 185lbs. 42 in chest 33 inch arms 16 1/2 neck. A friend of mine came down yesterday from Washington. You know what we talked about? The reckless 80. Not wives or family.... we got there eventually.
The description on the website is spot on. Warm (even when compressed under the body armor), light, and very compact.
I wore it under my body armor at -5°C and it did keep me warm even after it did get wet.
Perfect warm layer for me. I even wear it when not out on my bike. Worth every penny!
I rarely write reviews but have to on this one. I was looking for a mid layer that I could also wear around camp/town/etc.. First of all, fit is perfect, I am 6'1" and 190 lbs and I got the XL, which fits like an XL slim - perfect for me! I am not only wearing this on the bike, I went to a concert with my wife wearing it. She complemented my new nice jacket, I guess I forgot to mention that it's a mid layer biker jacket. I even wear this in my home office when working, it is light weight, looks good, very functional, haven't spent a lot of time with it riding, but I have no doubt I will be super happy in all situations!