Description
The I Don't Know How To Act My Age Men's Premium Long Sleeve T-Shirt is a fun and lighthearted choice for men who live life with a youthful spirit. Featuring the witty phrase "I Don't Know How To Act My Age, I've Never Been This Old Before," this shirt makes a great birthday gift for anyone who refuses to let age define them. Perfect for those who are young at heart and enjoy a good laugh.
Crafted from high-quality fabric, this premium long sleeve tee is designed for both comfort and durability. Whether you're celebrating a milestone birthday or simply embracing your playful side, this shirt adds a humorous touch to your wardrobe. Ideal for casual outings or layering in cooler weather, it's a stylish way to share your attitude toward aging.
Tags: men's funny birthday shirt, young at heart long sleeve tee, I don't know how to act my age, humorous men's shirt, novelty birthday gift, men's long sleeve tee with funny quote, funny age-related shirts.
Size Guide

Normal Fit
A | B | C | |
---|---|---|---|
S | 27.48 inch | 17.99 inch | 24.49 inch |
M | 28.98 inch | 20 inch | 25.47 inch |
L | 30 inch | 21.97 inch | 26.5 inch |
XL | 30.98 inch | 23.46 inch | 26.97 inch |
2XL | 31.5 inch | 25 inch | 26.5 inch |
3XL | 31.97 inch | 27.48 inch | 27.99 inch |
Details
This Men's Long Sleeve Graphic T-Shirt is like your favorite tee, but with the added benefit of long sleeves. It's comfortable, durable, and available in a variety of graphic prints. Perfect for any occasion—whether you're relaxing at home, going out casually.
- 100% Cotton
- Heather Gray is 95%/5% viscose
- Charcoal Gray is 80% cotton/20% polyester
- Heather Burgundy is 60% cotton/40% polyester
- Fabric Weight: 4.42 oz (Light Weight)
- Wide range of sizes from S-3XL
- Fairly produced, certified and triple audited.
- Double stitched, reinforced seams at shoulder, sleeve, collar and waist
- Optimized for beautiful brilliance across all graphic printing methods
- Imported; processed and printed in the U.S.A.