Per a Nike release:
The Crimson Tide uniforms will be upgraded to include Nike Chain Maille Mesh – a lightweight, ultra-breathable material that emphasizes improved thermoregulation. This new fabrication is incorporated into the back and under the arms of the jersey for exceptional ventilation without sacrificing durability. The white-on-white look, embellished with crimson accents, creates the iconic, bold silhouette for which the Tide is famous.
Alabama will also wear the new Nike Pro Combat Hypercool Speed Top featuring Nike Dri-Fit fabrication that transports moisture and sweat from the skin to the outside of the top, leaving the body cool and dry. Regulated for the weather with increased breathability and a streamlined fit, this revolutionary baselayer top features new innovative venting systems including laser perforation pods in a unique design pattern that help the body regulate temperature. It also features reinforced bonded seams as well as premium mesh underarm gussets for increased thermoregulation.