The T-shirt has side seams, and the seams around the neck and shoulders are specially reinforced.
Brand: ROLY
This product does not have real-time customization. You can simply upload prints, images, or text, or request a free mock-up. Another option is to add the desired product to your cart, then for a T-shirt product (men's, women's, or children's), add images or text there and use real-time customization to see how it looks, add it to the cart, and clarify that the product you actually want is the long-sleeved shirt with that print, for example.
