I've now used the Exped Dreamwalker 450 on several occasions from Zion NP to the Superstition Wilderness in AZ down to 27°. Additionally I've used it not only as the sleeping bag but also as cocoon around my hammock and as a coat (See ealier postings below). In all cases the bag has exceeded expectations. Combined with the Exped Multi-Mat these are two of the most versitile pieces of equipment I own.
