FeaturesHeavy weight 420 weight Polartec Thermal Pro fleece base layerTwo front zippers aid in heat regulation for comfort at varying temperature and activity levelsInterior chest flap pocket with hook & loop closureThis is a solid, well-made fleece, perfect for cool weather or for layering when it’s colderTechnical SpecsThe 2-Zip Fleece is made of very warm 420 weight Polartec Thermal Pro fleece.It has an interior front flap pocket and a bicep pocket with pen tubes. It wears like a sweater.Cold weather gear is designed to keep you warm in the harshest winter climates.but instead of having one zipper going down the center of the fleece it has two on each side of the collar,the two front zippers aid in heat regulation for comfort at varying temperature and activity levels,it can be worn alone or under a jacket.The material used is quick drying and prevents effectively the loss of body heat.It has two slanted front zippers that can be used depending on your preference.If you open both zippers, you have access to the inside, covered pocket.