While the Stella version is identical construction-wise

while the waterproof zipper and Velcro closure collar are effective at preventing water ingress

four shell sizes

Shoulders/Elbows EN 1621‑1 Level 1—it uses highly perforated Cell Technology with a back flexion channel and quick‑buckle elastic closure for airflow and a secure fit

a aria switch jersey short sleeve black Color:Black While the Stella version isLightweight and highly breathable, the A Aria Switch Short Sleeve Jersey provides maximum comfort while you perform on the trails, and even as the temperature rises. Made of breathable polyester, this MX and off road sportswear jersey is your best ally for long riding sessions, with a lightweight feel built for hot weather trail riding.