Personalized Thanksgiving Kneeling Pilgrims Gratitude Blessing Long Sleeve T-Shirt. Pilgrims kneel in prayer to say thanks on this 1st Thanksgiving holiday Long Sleeve T-Shirt - Vintage Black outfit. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL