kids long sleeve undershirt

Common materials are polyester blends (for example, 90% polyester/10% spandex and 85% polyester/15% spandex) and cotton-poly blends (for example, 60% cotton/40% polyester).

Typical fabric constructions include thermal, jacquard knit, and jersey.

Sizing is generally listed as “Kids.” Common fits are Regular Fit for everyday wear and Compression Fit for performance styles.

Typical necklines include crew necks and henley necklines.

Features include heat-generating finishes, moisture-wicking finishes, and some heat-converting technologies that turn body moisture into heat on certain styles.

Some items offer sensory-friendly details such as flat seams, no sewn-in tags, heat-sealed care/size labels, and other adaptive design elements that make dressing easier.

They typically use a basic long sleeve with no distinct cuff; some thermal base layers also include thumbholes for extra coverage.

Performance options commonly include moisture-wicking fabrics and ventilating mesh panels designed to wick sweat and increase airflow.