Louis Garneau Men's Size Chart The Pro Carbon Comfort Top is a lightweight sleeveless summer vest that blends performance features with next level comfort. Laser-cut shoulders and the top flap covering the two back pockets are engineered to improve the overall aerodynamics, while the full length zip features a comfortable inner trim to eliminate chafing. Innovative Coldblack(R) technology keeps you cool - even on the hottest days - by efficiently blocking the heat build-up caused by UV rays. The top also provides sun protection up to UPF/SPF 50. Throughout the top both Micro-Activ and flatlock seams are employed to reduce chafing and irritation of the skin, while reflective accents on the front and back help improve low-light visibility. The shoulder sections are constructed from Tri-Rev fabric, which has a compression quality that supports muscle function. Features: - Relaxed fit - Quick-drying, breathable and chlorine-resistant. - The addition of carbon fiber helps enhance blood circulation - coldblack(R) treatment reflects UV rays for cooling - 2 covered pockets at sides - Minimalist stitching provides optimal comfort and reduces the risks of chafing - Tri-specific seams placement for optimal comfort on swim, bike and run - Reflective accents - Full-length zip with inner flap - UPF/SPF 50