Thank you for viewing. This is a Montbell Down Hugger 650 FP #1, right zip. Although it's an older model, it's said to have a lower temperature rating than the current model, and the down is less prone to clumping. I've used it about 10 times for tent camping in the Yatsugatake and Northern Alps during winter. I personally believe that the ability to stretch and sit cross-legged while inside the sleeping bag, along with its portability and heat retention, are what make it the No. 1 sleeping bag. This sleeping bag uses 650 fill power down and is suitable for temperatures down to -30°C. Montbell's down sleeping bags are excellent in combination with their stuff sacks; you can quickly compress them from a fluffy state into a compact size! I think it's also perfect for sleeping in a car. - Model Name: Down Hugger 650 #1 - Comfort Temperature: -4°C / 25°F - Limit Temperature: -10°C / 13°F - Extreme Temperature: -30°C / -21°F - Features: Super Spiral Stretch System - Down Grade: 650FP Thank you.