Details Rab Sonic Ultra Vest - Women's Baselayer The Rab Sonic Ultra Vest uses a lightweight, wicking and highly breathable Motiv Aero fabric that makes it ideal for running or as part of a layering system. An active odour control treatment helps maintain freshness for the lifetime of the garment. Weight: 47g Lightweight fast wicking fabric with bulk yarn technology Racerback design Lightweight fast wicking fabric with bulk yarn technology Microactive seams are strong and soft inside for comfort Laser cut vent holes in back of the neck Split hem detailing with reflective bar tack Reflective branding Hydration pack ready comfort fit Minimised seams positioned for reduced chafing over long distances 100% polyester Slim fit Fabric: 85g/m2 Motiv™ Aero single jersey fabric with subtle mesh structure and odour control treatment Specifications Sonic Ultra Vest - Women's Baselayer