Reebok Size Chart The Reebok Performance 1/4 Zip pullover features Speedwick technology that rapidly removes sweat to keep you dry. A 1/4 length zipper lets you adjust the ventilation, and the mock neck provides extra coverage. The regular fit works well over a base layer or worn by itself. Features: - Regular fit - Speedwick technology wicks sweat away from the body to help you stay cool and dry - Mock neck - 1/4 zip collar