I have always loved 100% cotton straps. They are lightweight, easy to fit in a case, comfortable, and have just the right amount of resistance against your clothes on your shoulder.
I had a supplier many years ago who made me a 3" wide cotton strap. When he shut down, I was never able to find another supplier who could provide me with 3" wide material (without investing $10,000). I am pleased to have sourced this out again and I am now able to make Sadowsky 100% cotton straps in 3" and 2" width. Strong cotton ends have a 3/8" strap pin hole, making it "StrapLok®" friendly.
Your gonna love these new straps....I guarantee it!