CRUCIAL UPDATED COMPATIBILITY INFORMATION
The Sweetie Pie* Sleeping Bag Doubler: “Camping is more fun with your Sweetie Pie.” The Doubler is designed to convert your single person mummy bag into an amazingly roomy bag that can sleep two people. Couples wishing to sleep together can do so warmly and comfortably while saving weight and creating space. The Doubler places the zippers on the edges of your bag and the extra space provides the luxurious feeling of sleeping in a bed. It is possible to sleep back-to-back with your knees pulled up. The Doubler can also be zipped into itself to create a kid's bag or bivy sack.
The Sweetie Pie Sleeping Bag Expander: “We aren't mummies after all.” Create a mommy bag with the Expander-perfect for pregnant and nursing mothers or for snuggling with your toddler. The Expander is also appreciated by robust individuals who just want more room, and for those who dislike the claustrophobic feeling of a mummy bag. “Yours, Mine, and Ours” Expand your options three ways when you purchase two Expanders: for couples, zip two Expanders together to create a Doubler, and you each have your own Expander for individual adventuring; camping with children? Zip two Expanders to each other to create a kid-size bag.
The Sweetie Pie was designed to accommodate the varying needs of bicyclists, kayakers, rock climbers, backpackers, and family campers. The Doubler is available in both 3-season and Summer weights, the Expander in 3-season weight. The Sweetie Pie allows you to create your own custom sleeping system and can be used on top of or underneath your bag. This enables you to use your favorite sleeping bag year-round in a variety of weather and sleeping configurations.
The Sweetie Pie is made with a full-length 70” YKK #8 coil separating zipper, 50 denier Ripstop Nylon, double layers of Polarguard 3D insulation with offset stitching (one layer in the Summer weight), and built in draft tubes along the zipper. The result is a highly compressible pie that is lightweight, breathable, absorbs little moisture and retains loft even when wet. The Sweetie Pie is easily stored and laundered, and is non-allergenic and mildew resistant.
Important updated compatibility information:
both Doublers & Expanders are compatible with many high-end mummy style sleeping bags made after 2000 using a full-length YKK #8 coil separating zipper. Click here to read details.
Camping with kids: Jennifer Aist Alaskan outdoor educator, author, and mom reports "This is definitely in my top ten list, maybe even my top three!" from her book "Babes in the Woods" published summer 2010 by the Mountaineers. http://wildernessforkids.com/wp/?p=668 Rock Climbers: Mike Ousley, on a honeymoon ascent of El Capitan writes "The Sweetie Pie, manufactured by Functional Design, is a boon for the bivouac-bound couple..." from p. 9 of his Yosemite climbing journal http://www.ousleycreative.com/honey.pdf Top 10 Gear List Backpacking-guide.com "The best sleeping bag option for couples is the Sweetie Pie Doubler." http://www.backpacking-guide.com/backpacking-sleeping-bag-reviews.html