The On Climate Shirt is a high-performance mid-layer designed for year-round workouts, especially in cold weather. Engineered with lightweight yet warm fabric, this shirt excels in sweat-wicking and moisture management thanks to its multi-dimensional woven structure. The quarter zip closure allows for easy on and off, making it versatile for various running conditions. Thoughtful features include a thumb hole for added coverage, reflective details for low-light visibility, and a side pocket for essentials. Designed to move with you, darts at the elbow and back ensure a comfortable fit that contours to your body. Made from 99% polyester and 1% polyamide, this shirt boasts at least 90% recycled content, highlighting its commitment to sustainability. Ideal for fast training, races, and everyday runs, the Climate Shirt weighs just 9.0 oz (255 g), making it a lightweight yet effective layer for your running wardrobe.