Investing in a base layer might seem like an unnecessary step, especially when you're comfortable in the kit you already have, but layering with the Pearl Izumi men's Transfer Sleeveless Base Layer can actually enhance a jersey's cooling and moisture wicking capabilities on a hot summer day. The sleeveless design is versatile enough to fit under jerseys from early in the season through fall, with a contoured fit to follow your body movements in the saddle and smooth, chafe free seaming that you'll hardly notice over your bibs. The Transfer is made from Pearl's ultralight P. R. O. Transfer Dry fabric, a polyester and elastane blend that speeds up the evaporation process as you sweat. Airy mesh constitutes the base layer's back panel to further encourage airflow, and when the weather takes a cooler turn in the fall, the entire base layer will continue to wick moisture away from your skin under thermal layers, warding off a damp chill that can make the final 30 minutes of a base mile ride miserable. Regardless of the season, the inclusion of activated charcoal in the fabric's yarns helps the base layer fend off odors for longer than a typical next to skin layer a welcome feature for those of us who us base layers for more than a single ride without washing.