There's no guarantee that the weather will play ball whenever you are out hiking or climbing, its bound to get cool at some point especially when in exposed terrain. Even when out in the summer months sometimes a little insulation is required for milder conditions. The Arcteryx Atom SL Hoody is just perfect for this situation. Its an efficient midlayer balancing air permeability with wind resistance and cut the chill factor down when being static for any length of time. The Coreloft insulation is compressible, still insulates you when wet and will manage moisture as you move. Articulated sleeves and gusseted underarms improve mobility and is in a trim, slim fit. Other features include adjustable Storm Hood, hem draw cord and two zipped hand pockets.
For more Arcteryx insulated layers for men and women, click here