Personalized Prayer Power Silver Youth T-Shirt. Christian and Catholic Youth T-Shirt - White for prayer warriors and people of faith for your next bible study or fellowship meeting says Prayer The Most Powerful Weapon with Calvary cross graphic. Perfect to profess your faith. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.