Louis Garneau Men's Elite Course Sleeveless Tri Top coldblack: Reflects UV rays to reduce heat build-up even on dark textiles One-piece technology: Minimum number of seams to enhance aerodynamics and minimize risks of irritation 15"/38 cm comfort zip with inner flap: Protects skin from abrasion and chafing - Zip garage: Prevents neck irritation Comfort-designed armholes and neck: Accommodate full range of motion Back reflective accent