Coleman has re-engineered their Atom Range and has come up with a couple of excellent lightweight mummy
sleeping bags (all you need's a pyramid) that are compact and yet very efficient due to the Coletherm Micro insulation and loose shell construction. The Atom's are ideal for modern trekkers who want great performance in a light compact bag. The Atom X1400 comes with a soft nylon square ripstop shell, double layer (2 x 175g/m2) insulation, soft nylon lining. It also features all of Coleman's Easy Sleep characteristics: zip plow, autolock zipper, Thermolock zipper baffle, pillow pocket, thermo-collar, security pocket and 3D foot area. With a Limit rating of -5°C we'd suggest for use in the spring, summer or autumn.