The ultralight summer sleeping bag has a highquality Microtec Ultra microfiber with extremely low weight to high thermal insulation properties (total weight of the sleeping bag 490g). In addition, it insulates very well even at higher humidity. The upper lightweight ripstop material has a WR (water repellent) surface treatment against water absorption. The anatomically shaped sleeping bag has a onehand adjustable hood pull. The twoway zipper is covered with a reinforced flap to prevent snagging and a flap to prevent heat from escaping. A safety lock against spontaneous opening of the zipper is a matter of course for almost all our sleeping bag models.