For those who are looking for something good for wool... I wear a lot of very lightweight merino & cashmere, so I'm pretty cautious on what laundry soaps I use. I really like the wool/cashmere formula made by The Laundress. They refer to it as a Wool & Cashmere shampoo. It is available in a 2 oz travel/trial size bottle. It's pH neutral and smells delicious - cedar and sandalwood. Very nice alternative to the more floral scent most laundry soap has.

Unfortunately, it's not cheap. But neither was all of this merino/cashmere clothing and I want to do all I can to protect it!

And while I've never tried the following, I have seen instructions on Pinterest before for making your own travel detergent "sheets". Essentially, you soak a paper towel with your laundry soap, hang it to dry, then cut into small pieces. Store in a ziplock bag. Then when you need to wash something in the sink/tub, toss 1-2 of your little paper towel pieces into the water and supposedly it makes a sink full of laundry suds.

I might test this idea this week or weekend. I'm curious to know if this might be a viable option for brief trips when I really need to make space/weight count.