Personalized I Love My Grumpy Very Much Retro Groovy T-Shirt. With its vibrant colors and retro design, this product is sure to stand out and make a statement. It's not just a product, but a symbol of the love and connection between grandparents and their grandchildren. So why wait? Get this groovy design today and let your grumpy grandpa or grandma know just how much they mean to you! 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.