This month, we’re introducing Pertex Y Fuse, the newest outer shell fabric for our 3-season sleeping bags. Y Fuse will replace the Nano fabric, which will be phased out. We’re making the switch because of recent improvements in fabric technology: the Y Fuse fabric uses yarns with unique Y-shaped filaments that create a tightly interlocking structure.
This structure makes for a highly stable fabric with increased downproofing and water beading properties. We’ve put it to the test, both on the design floor and on the trail, and love the added durability of Y Fuse. It’s designed to handle years of wear and multiple washes, and comes with some added softness too.
The Y Fuse is a 20 denier fabric, the same as the Nano fabric we used previously, but is slightly lighter weight. We still recommend that those looking for the lightest, loftiest sleeping bags check out our UL line, which features 10 denier Pertex Endurance fabric and 950+ fill down, but the Y Fuse bags will shave a few grams from the Nano generation’s weight. Great for all-around use and made to last, the Y Fuse fabric adds a fresh set of features to some of our best-loved bags.
Which sleeping bags will be offered in the Y Fuse fabric?
Sleeping bags we currently make in the Nano fabric will be offered in Y Fuse. This includes the following models: Flicker, Hummingbird, Swallow, Swift, Osprey, Merlin, Kestrel, Lark, Raven, Grouse, Egret, Petrel, Puffin, Penguin, and Condor.
We’ll be phasing the fabric into our line throughout the summer, so if your model of choice isn’t available in Y Fuse yet, it will be soon!
Will anything else change about the 3-season sleeping bags?
In addition to new shell fabric, the Y Fuse bags will feature a new 20D nylon lining that is softer and lighter than the previous lining. We will continue to use high quality European 900+ fill down in all sleeping bags with the Y Fuse fabric, and the design and sizing of the bags will remain the same.
What colors will the Y Fuse come in?
We’ll make Y Fuse bags in four classic colors: Iris, Fir, Cardinal, and Marine. We’ll offer each sleeping bag in 1-3 of these color options.
Where can I see the technical specs for the Y Fuse fabric?
You can find more information on our fabrics page.
Want to know which Y Fuse bags are currently available?
You can find the latest bags on our Y Fuse page.
Have another question? Send us an email at email@example.com.