Here's what other sites are saying:
Big Agnes' Spike Lake 15deg mummy bag delivers high value and performance in a lightweight bag. Ideal for backpacking but versatile enough for couch surfing, it's insulated with DownTek and uses baffle construction for efficient heat distribution. If you're in the market for a mummy shaped bag constructed with high quality, lightweight materials this bag is your ticket to traveling fast and light.
- Mountain Gear
With a traditional mummy shape, DownTek(TM) down insulation and baffle construction, the Big Agnes Spike Lake 15 sleeping bag provides warmth and minimal weight so you can travel fast and light.
Features of the Big Agnes Spike Lake 15 Degree Sleeping Bag Our traditional down mummy bags deliver Technical, lightweight Performance to excel on and off the trail with High thermal value, compressibility and comfort Traditional mummy shape allows for lightweight and increased thermal value Contoured hood follows the shape of your head for a more comfortable Fit Oversized interior anti-draft collar Low profile cordlock lets you un-cinch the hood with one hand Breathable shell fabric with a water repellent finish Anti-snag zipper for a smooth, quick zip YKK #5 anti-snag locking zipper Two-way zipper Liner loops Mate together left and right zip bags Mesh storage sack and nylon stuff sack No-draft collar and no-draft zipper Exterior loops for hang drying or storage Baffled construction 600 Fill downtek water repellent down Bluesign certified down Fabric Details Nylon rip-stop shell fabric Nylon taffeta lining
Big Agnes Backpacking Sleeping Bags Spike Lake 15 Sleeping Bag (600 Down)-Flint/Navy-Regular-Left. It was designed to decrease weight and size while increasing thermal value using the traditional mummy shape.