Filson Twin Lakes Short Sleeve Sport Shirt is a lightweight, warm-weather shirt built for active use. It combines moisture-wicking COOLMAX performance with a slight stretch for comfort and sun protection. Key attributes: Multicolor | Beluga | Print | COOLMAX polyester, cotton, Lycra | Lightweight for warm-weather comfort | Moisture-wicking | Quick-drying | Slight stretch from Lycra | UPF 20+ sun protection | Button-front closure | Button-flap chest pockets | Left-chest slotted tool patch | Embroidered eyelets for ventilation and pocket drainage | Spread collar | Short sleeves | Allover printed pattern | Button-flap pocket detailing | Dimensions & fit: Neck: 15.5" / 16.25" / 17" / 18" / 19" / 20" / 21" (XS–3XL) | Chest: 35.5" / 38.5" / 41.5" / 44.5" / 47.5" / 50.5" / 53.5" (XS–3XL) | Waist: 29" / 32" / 35" / 38" / 41" / 44" / 47" (XS–3XL) | Pit to pit: 16.5" / 17.25" / 18" / 18.75" / 19.5" / 20.25" / 21" (XS–3XL) | Arm length: 33" / 34" / 35" / 36" / 36.75" / 37.5" / 38.25" (XS–3XL) | Model is 6'1" wearing a size medium | Composition & care: 50% COOLMAX polyester | 47% cotton | 3% Lycra | Machine wash cold, tumble-dry low heat. Do not bleach. Iron warm if needed.