Men's Icebreaker ZoneKnit 260 Half Zip - 260gsm Performance Merino Wool Merino Wool at it's most effective and sophisticated best. Made for high octane days on the slopes, on the roads and in the saddle. The Men's Winter ZoneKnit 260 warmest half zip base layer aimed at those with an active lifestyle that seek a natural fibre garment but with a level of technical specification to meet the demands of your sport. This item is a blend of 100% Merino Wool in an 18 Micron weave 260GSM fabric weight providing the warmest structure with Zoned 200gsm areas using a vented eyelet structure of Merino Wool for advanced moisture management that offers increased garment ventilation for running, cycling and any other high energy winter active sport. This can readily be worn on it's own as an active use run top as well as a pure base layer, which makes this item pretty versatile. Deep set half-zip for added ventilation on-demand plus structured thumb hole cuffs for added hand protection and a stylish dropped front & back hemline for added coverage. Vented ZONES under the arms and areas of the back made from soft engineered eyelet Merino Wool where heat can disperse readily and where moisture control is needed more. Super soft flatlock seams throughout and Raglan sleeve shoulders for zero interference and a flattering fit without restriction. Icebreaker's legendary Ethical production and wool source applied and a superb quality piece you'd be happy being seen in any day of the week.