Aero 1/2 Zip Men'sSoft and smooth coverage that can be worn on its own or as an extra layer, the Aero 1 2 Zip has a lightweight breathable mesh back and is easily adjusts at the neck and sleeves so you can stay comfortable as you heat up or cool down. 1 2 zip long sleeve 2. Stand collar 3. Hybrid raglan sleeve with under arm gusset for movement 4. Moisture wicking jersey on front and arms 5. Lightweight breathable mesh back panel 6. Thumbholes at sleeve cuffs for extra