There is nothing remarkable in North Face replacing your bag. Most of the reputable vendors will. It is called PR. The point is Wiggys makes this promise up front in writing. My status as moderator does not carry any wieght in discussing products. I merely give my empirical experience and whatever additional resources are available. I chose a wiggy unit on the direct advise of Chris Janowskie of WSI . I also was shocked to see Wiggy bags listed in THE WINTER WILDERNESS COMPANION by Garret and Alexandra Conover. These folks are major advocates of 'traditional' ( wool, leather etc.) clothing and related gear. I don't want this degrading into a "my sleeping bag can beat up your sleeping bag." Only one person normally climbs into one anyway, so it's a personal choice with personal consequences.