The weather on your morning bike ride starts out foggy and moves to slightly windy, then sunny. Luckily, the fabric in the Pearl Izumi Men's Zephrr Vest is water- and wind-resistant, breathable, and packable. The Zephrr's form fit doesn't leave baggy fabric blowing in the breeze, and reflective piping and logos increase your visibility on low-light rides. Pack the Zephrr Vest into its inside pocket when the sun comes out.
Bottom Line: Zip into Pearl Izumi's Zephrr Vest for lightweight core protection.
Got this vest to wear on the morning bike commute, and found that it is the perfect addition for winter/spring running as well...it is the perfect piece to take the chill off the cold morning while still allowing heat to escape when you get moving. I usually wear over a midweight base layer down to 25 deg F, or over a lightweight base layer up to about 40-45 and stay very comfortable at the beginning and throughout my workouts.
Also, the screaming yellow color provides excellent visibility in all lighting conditions - key when running or riding in urban environments.
I'm 5'8" and 125, usually between a small and a medium. So I took the advice and ordered up. It is definitely an American medium. To much extra fabric for me so I'm going to return it. I already found a Santini vest that was a little cheaper so I ordered a small and medium in that just in case. The medium of Santini is much more form fitting. So a PI medium = a San large or xl
other than that it was great material and quality.
Mainly used while Skate Skiing (X-Country). The vest has a nice high collar which really works on 38 degree, blowing snow days. The packable design is great for the morning ski then fold and stuff into fanny pack as the days warm. Probably my most used piece of torso outerwear.
