Bring a touch of laid-back style to your Boston Celtics fandom with the Columbia Slack Tide Camp Button-Up Shirt Its lightweight fabric features Omni-Wick technology to keep you cool and dry while Omni-Shade UPF 50 sun protection guards against harmful UV rays Mesh-lined back vents enhance breathability making this button-up perfect for outings or cheering on the Boston Celtics from the stands Columbia Sportswear Columbia Boston Celtics Slack Tide Camp Button-Up Shirt Black, Small - NBA Tees at Academy Sports