What is the difference between the Micro...
What is the difference between the Micro and Regular versions?
The micro is just the name of this series of sleeping bag so if you mean the Micro MC II and MC III the difference is the temp rating and weight.
if you mean between the micro series and the other Sea to Summit sleeping bags then there is a lot of differences. Finally if you mean the regular and long versions is the length, weight, and side the zipper is on.