Castelli Cold Days 2nd Layer Womens Long Sleeve Base Layer

Castelli Cold Days 2nd Layer Womens Long Sleeve Base Layer This Womens Long Sleeve Base Layer by Castelli is ideal for freezing cold days; and makes an ideal 2nd layer; over a base layer. Polartec® Alpha® 90 high-loft active insulation is key to the warmth; and is soft; stretchy and breathable while keeping weight to a minimum. The half zip keeps bulk down while still allowing some adjustment; and it’s slightly offset so doesn’t clash with zips on other garments. A high collar prevents draughts; and the base layer has a close-to-body fit that can be tucked into a pair of tights or worn over the top.