Personalized Prayer Power Silver T-Shirt. Christian and Catholic T-Shirt - Red 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. Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.