The Fullcount 5222 Flat Seam Heavyweight T-Shirt has been a cornerstone of the brand’s lineup for over two decades—an essential piece that perfectly reflects Fullcount’s dedication to comfort, craftsmanship, and timeless design.

Made in Japan from premium heavyweight cotton, the fabric is knitted on vintage loopwheel machines, resulting in a dense yet incredibly soft texture that feels luxurious from the very first wear. Unlike standard jersey knits, it offers a rounded, fuller hand feel, combining structure with exceptional comfort.

A defining feature of this model is its flat seam construction, executed on vintage Union Special machines. This rare technique—typically reserved for heritage garments—creates a smooth, irritation-free finish, ensuring maximum comfort against the skin while enhancing durability.

The silhouette is slightly boxy and relaxed, allowing for ease of movement and a more classic, vintage-inspired look. Built to last and designed to improve with wear, this is a T-shirt that elevates the everyday essential into something truly special.

Fit Notes: This model fits true to size and runs slightly larger than most Japanese T-shirts. We recommend taking your usual size for a comfortable fit. Compared to most global American brands, a size 40 fits similarly to a Medium. As always, we strongly recommend checking our size chart and comparing it to your best-fitting shirt to find the perfect size.