The Ultralight 600 has been designed for travellers looking for an ultra compact sleeping bag to take on their travels. With a comfort rating of 12 degrees it's not designed for UK use unless peak summer but if you are prepared to use base layers you could use it for bikepacking and trekking across Europe. The ultrasoft polyester outer shell is also water resistant and breathable. The snug fit mummy shaped design aims to reduce the excess air space to create the maximum heat retention with less filling. The shaped hood and foot areas add comfort and remove air gaps. The handy pillow pocket on the rear can be filled with a jumper or small pillow for comfort. There is a handy internal pocket for valuables or accessories and the bag has an insulated zip baffle and 2 way zip.