For synthetics, you still cannot use a standard washer, ie, anything with an agitator. As was reported it causes clumping, loss of seam strength, if not outright seam tearing, and broken baffles…that is more difficult to detect. Do not do it.
same with down baffles, especially UL ones
Even with the loss of loft, a good synthetic bag still wants washing every couple weeks of use, like any other bedding at home.
no … i wear my synth puffy daily for 18+ hours a day … with my down vest underneath
and i sleep in my cats meow nightly … for the last few years … i wash it every few months … it does not "want" washing
i use both down and synth daily … i eat, sleep, climb, defecate while wearing it at home and out side … synth does not "need" washing every couple of weeks
Do not wash with any form of heat. Hot, or warm water is terrible on synthetics. Hot water on down does not hurt it. Cold water only. Washing will NOT restore loft with synthetics. A good hot washing of down, will. (Hot water up to the point the shell/zipper can handle is OK with down.) The plastics used to make the fibers have a memory. Even slight heating will cause them to pull tighter or compress.
DRYING with low/moderate heat is absolutely fine… i do it all the time and it DOES restore some loft
http://www.primaloft.com/en/performance/customer-support/consumer-support.html
"Follow these instructions when caring for your garments made with PrimaLoft® insulation. Machine wash and rinse in cold water, gentle cycle. Tumble dry warm, remove promptly. Do not dry clean, bleach, iron or steam."
The BEST of the synthetics is roughly equivalent to 500fill down. Always store a synthetic bag hung. NEVER in a sack. Even slight compression will cause loss of loft. Down can be stored loose, in a sack because the fibers can "slip" by each other.
these days the news ones are claimed to be comparable to 600+ fill … the technology of synthetics keeps on advancing
as for loft loss … a loose cotton or mesh sack is fine … just dont stuff it
BPLers go on and on about synthetics dying like the dynos …. well enough people have bought "quality" synthetics like MLD spirit quilts or EE's synth quilts … who here is willing to step up and say they die fast … i posted one review from someone who uses it daily who says she prefers it over down bags and they last for her under daily use
theres ALOT of BPL "hate the synthetics" myths going around
now synthetics DO have significant advantages and disadvantages …
but they dont die at the drop of a hat … and i use mine daily, close to every day, close to 18+ hours a day in the winter for the last few years
im wearing an 800 fill down vest, an el cheapo synth puffy, a 650 fill down puffy, and a TNF cats meow synth bag as i type this with the window open and no heat at night
;)