When your weather app tells you short sleeves is not going to cut it for today's run, reach for this adidas T-shirt. Its classic crewneck fit and build make it a staple in every runner's wardrobe. Slip your thumbs into the holes in the cuffs, and your hands will stay the perfect temperature. Moisture-absorbing AEROREADY helps keep you dry, and when it starts to get darker earlier, reflective details shine in low light.