The Armada Rotor HW 1/2 Zip Fleece treads that fine line between being a base-layer and a mid-weight layer, with both 132 gram/m² and 229 gram/m² weights of Polartec® Power Grid fleece. Great as a base-layer on colder days or by itself in warmer temps, the Rotor HW is a versatile piece that will see tons of wear both on the mountain and in town.