Icebreaker ZoneKnit Insulated Knit Bomber - Women's Black Extra Small. Features of Icebreaker ZoneKnit Insulated Knit Bomber - Women's ZoneKnit - Body mapping technology?designed to actively regulate body temperature and?let skin breathe?during high-intensity activity 12 gauge knit Double layer rib bomber collar Quilted 3-layer inlay knit insulation at front Center front zipper Zippered hand pockets 1x1 rib cuffs 1x1 rib bottom hem Package Contents: Icebreaker ZoneKnit Insulated Knit Bomber - Women's Icebreaker IB0A56JP001XL: ZoneKnit Insulated Knit Bomber - Women's Black Extra Large Icebreaker IB0A56JP001L: ZoneKnit Insulated Knit Bomber - Women's Black Large Icebreaker IB0A56JP001S: ZoneKnit Insulated Knit Bomber - Women's Black Small Icebreaker IB0A56JP001XS: ZoneKnit Insulated Knit Bomber - Women's Black Extra Small Icebreaker IB0A56JP001M: ZoneKnit Insulated Knit Bomber - Women's Black Medium Icebreaker IB0A56JP001XS: ZoneKnit Insulated Knit Bomber - Women's Black Extra Small