If you are new to outdoor recreation, or you only camp occasionally, the Trailhead synthetic sleeping bag is a great value-oriented option. However, the modest price tag doesnt mean Sea to Summit has cut corners on comfort and versatility. Like all Sea to Summit synthetic sleeping bags, the Trailhead utilizes WaveLoft construction to allow the insulation to expand out into air-trapping curves for maximum warmth. As the temperature rises, the full-length zipper (which curves around through the foot box) allows you to sequentially increase ventilation to the point where the sleeping bag can be opened flat and used as a quilt.