Keep yourself protected even in the most varied conditions with the Berghaus Hartsop Half-Zip Micro Fleece. Constructed using Berghaus\' AT Microfleece, the Hartstop provides unrivaled warmth, insulation, and lightweight construction. The sporty single sided velour microfleece made from 100% polyester is extremely comfortable and ready for your next adventure.½ zip fastening systemAT Micro fleece fabric - insulating and protecting without adding weightDouble fabric collar - protecting your neck from warm weatherRaglan seams - reduce irritation from chaffing100% Polyester