With durability you can trust on the mountain and light insulation for cold starts on the trail, the Defend Thermal Long Sleeve Jersey helps you tackle the toughest trails with confidence and in warm comfort. The stretch grid construction offers channeled insulation to provide enhanced lightweight, moisture-wicking insulation that keeps you warm and dry. In terms of trail-beating features, the DWR-coated nylon elbows and drop-tail offer increased abrasion resistance while the relaxed fit leaves room for elbow guards if you're going to push limits and get rowdy.