To achieve this curvaceous effect, you usually see that the women's jersey has more pieces than the typical mens cut which is just a front and back. Fabric Most jerseys, even the one's that look and feel like cotton, are made of polyester or a polyester blend so that they have the ability to wick moisture and breath. Although cotton breathes well, it retains moisture. Wearing a cotton T-shirt under a bicycle jersey totally negates the function of jersey. If you need an under garment, wear a polyester T-shirt or other technical layering piece.
Women can now wear a coordinating sport bra under their jerseys and ventilate just like the guys.
The technical reason for elastic hems is to keep the jersey from billowing in the wind. Many do not have elastic in the sleeves or body of the jersey. Pocket Style Traditional cut European racing jerseys have three pockets across the back. With the advent of off road riding, many jerseys now have zipper pockets to secure wallets and keys. Sizing Mens jersey fit and sizing is the most difficult issue to consider in selecting jerseys.