Personalized Hippo 1st Birthday Adult Performance T-Shirt. Hippo 1st Birthday! I mean Happy 1st Birthday! A cute, smiling hippo wearing a birthday hat sits in front of a birthday cake ready to blow out the candle. Cute first birthday gift for the one year old! This unisex performance t-shirt delivers lightweight comfort and dependable performance for everyday wear and active use. Constructed from moisture-wicking interlock fabric, it helps keep you dry and comfortable during workouts, errands, or casual days. The smooth, breathable knit also offers UPF 50+ sun protection, making it ideal for outdoor activities. A tear-away label adds comfort and convenience, while durable stitching ensures long-lasting wear. Versatile enough for layering or wearing on its own, this performance tee is a practical choice for any wardrobe.