Feathered Friends Petrel UL Sleeping Bag

This bag is designed for serious alpine environments and cold-weather backpacking. With a 10-degree Fahrenheit rating, it is built to handle freezing temperatures while keeping your pack weight low.

Yes. The Petrel UL uses continuous baffle construction, which allows you to manually shift the down insulation around the bag. This is particularly useful if you need to redistribute warmth to specific areas during the night.

The mummy shape is engineered for thermal efficiency, meaning it fits closer to your body to reduce dead air space that your body has to heat up. It includes a contoured hood and a trapezoidal footbox to ensure you stay warm without feeling overly restricted.

The Pertex Endurance shell is weather-resistant, meaning it is highly effective at blocking wind and light moisture like condensation or spindrift. While it offers excellent protection in alpine conditions, it is not fully waterproof like a dedicated rain shell.

Fill power measures the loft or 'fluffiness' of the down. At 950+, this is among the highest quality down available, providing an exceptional warmth-to-weight ratio that keeps the bag incredibly light and compressible without sacrificing insulation.

Yes, it includes an integrated draft collar that seals around your neck to prevent warm air from escaping. Combined with the contoured hood, these features help maintain a consistent microclimate inside the bag.