Icebreaker Size Chart One of Icebreaker's earliest and best-loved layers, the Original Long Sleeve Half Zip is made to move easily between the outdoors and the city. Its merino construction is naturally quick-drying and helps maintain a constant body temperature. The zip collar lets you adjust the ventilation, and forward-set side seams increase comfort. Features: - Zip neck collar for temperature regulation - Rib at neck - Forward set side seams for comfort - Center back length: 74cm / 29 1/4", Size L - Icebreaker embroidered logo - Large = 382 g / 13.4 oz - 100% Merino Wool