Your young Lewis or Clark is ready for a day of discovery when dressed in the Columbia Boy's Silver Ridge Shirt. Its lightweight nylon mini ripstop has integrated Omni Shade protection, so repeated applications of sunscreen which he already avoids like the plague won't be overly necessary. The Omni Wick polyester mesh lining dries quickly in case of splashes, perspiration, or an accidental dip in the river. During the heat of the day, your son will appreciate the roll up sleeves and well placed shoulder vents. Hook and loop closures on the extra large chest pockets secure any treasures he finds along the trail.