Nike Dry Challenger Top Men's Tennis Apparel Vivid Sky/Black : For premium comfort in motion the Nike Dry Challenger Top features a lightweight knit material enhanced with Dri-FIT technology. This fabric includes increased ventilation in high heat areas to ensure a dry and cool environment. The subtle, printed graphic across the chest provides a fun and sporty look. Slim Fit. Nike Swoosh at left chest. Drop hem at the back for extra coverage. Underarm gussets for easy movement during activity. Self-fabric binding and internal neck tape offer a smoother look and feel. Anti-abrasion labeling and flat seams reduce irritation and chafing.