Luhta says about the Ahonkulma
The Luhta Ahonkulma is a versatile garment that can be worn as a top layer on cool summer evenings or dry autumn days, or as a midlayer under a jacket in bad weather or wintry temperatures. The midsection of the jacket is made of a windproof fabric and it has a light padding. The horizontal channels have been glued instead of stitched, so that the wind can't get in through the stitches. The fabric also has a water- and dirt-repellent, PFC-free surface treatment. The jacket's sleeves and the collar are of a fleece material that feels delightfully soft and comfortable in addition to providing good thermal insulation. If you forget your gloves, simply bury your hands in the warmth of the lined front pockets.