We only use YKK Zippers in our Sleeping Bags as they perform the best in the world. We have never known a YKK zipper fail unlike some copies or cheaper version.

All the zippers in our Pure and Pure & Dry bags are the same type and the same length so they can be zipped together to make a double sleeping bag if you buy a LH and a RH. As other manufacturers use the same zipper it is likely they could also be zipped together with a TUNDRA bag.

You can find out more about YKK Zippers on their website here: https://www.ykkfastening.com/.