- Top layer fill - waterproof down
- Bottom layer fill - TechLoft Micro
- #8 separating zippers
- Insulated chest and zipper baffle
- Polyester ripstop outer fabric
- Polyester liner
- Compression stuff sack
The Vortex is a "heavy duty" Mummy bag. It uses a 2-layer offset construction to eliminate cold spots. The Vortex top layer uses waterproof down insulation and the bottom layer uses TechLoft Micro insulation. Techloft insulation consists of multi-hole staple-length micro-denier fibers that have a siliconized finish for maximum insulation, loft, and compactness. It will keep you toasty on those colder nights. The contoured hood also helps keep you warmer and keeps your warmth sealed in. For transporting, Browning includes a compression stuff sack. This is a great bag for those frigid nights when you want a good night sleep.