Following up on my previous review, I returned the petite bag for the regular size bag. It is perfect for my height. The interior is roomy. This is the first "mummy bag" (if you can really call it that) that I have been able to move around in a bit while I sleep. I have broad shoulders which usually forces me to purchase men's bags, but this bag has plenty of shoulder room. I find I can easily zip up the bag from the inside with one arm across my chest. I can bring my knees up to my waist when sleeping without a problem. The pad keeps the bag from twisting. You must use a pad with this bag because it lacks any insulation on the bottom. The pad brings the insulation, so be sure to note the R rating of your pad. The pad and bag are a great team. Once blown up, the pad slips right into the bag like an oversized pillow into a pillowcase. This bag doesn't skimp on the details. It has a draft tube, a chin tube, ties on the bottom for a bag liner. The firmness in the pad can be adjusted from releasing air from the pad--which you can do from inside the bag in case you get in and find it is too firm. Have used it once on a 30 degree night in the midwest, but it did the job. Plenty warm and really comfortable. I coupled this with a Big Agnes air pillow and I don't know that I'm as sold on that product. I may play around with a combination of travel pillows, but still, a great night's sleep. As an entry level backpacker, I greatly appreciate it's light weight. The color are funky in a fun way. Highly recommended.