Deuter has managed to do something quite tricky here: they've produced a reasonably priced bag that does not lack in performance or quality. - Worry-free High-Loft Hollowfibre insulation tolerates moisture - Durable materials: 70 denier polyester and 40 denier ripstop polyester - Regular size: suits up to 185 cm users - Width at shoulders: 74 cm - Width at foot box: 47 cm - Thermal collar helps prevent heat leaks - Small inner pocket - Two-directional zipper: you can couple the bag with another Deuter bag, using their zippers - Compression stuff sack - PFC free The choice of "left" or "right" tells which side the zipper is on when you are sleeping in it. Most right handed people choose a "left" bag and vice versa.