The patented Sidewinder Camp is designed specifically for those who sleep on their sides and prefer to explore the best of the outdoors by car, van, camper and setting up camp from home. With a unique fit that is plush and relaxed while keeping insulation close to the body, this cocoon style pattern creates a 360-degree wrap to give you that cozy tucked in feeling, like a hug. The Sidewinder Camp was designed as a relaxed fit for side sleepers who take camp comfort seriously. Our Women’s specific bags differ in shape and fill weight with a less drastic taper from shoulders, to hips, to feet - reducing cold spots and creating more warmth where it counts.Pat. 11957260 B2