Product Colors and Sizes

Special product, Innovation Special product, New Release Special product, Special product, Sale

Boys' Gym T-Shirt Breathable Short-Sleeved S900

Sale price: $5.00 Regular price: $12.99
Color: Select a color
Size: Select a size
Sale price: $5.00 Regular price: $12.99

Free returns

Free shipping over $30

Free pickup

San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8516266

Product Features

A photo of the Boys' Gym T-Shirt Breathable Short-Sleeved S900 in use

Boys' Gym T-Shirt Breathable Short-Sleeved S900 is designed for

T-shirt with 2 fabrics, designed for high-intensity sports. A very lightweight, stretchy fabric with mesh at the back for maximum ventilation.

Moisture wicking

Polyester-rich fabric for effective moisture management


Spandex for stretch and a cut designed to make intense movements easier


The lightest T-shirt in synthetic fabric Main fabric weighs 4.4 oz/m²

Product Customer Reviews

Skip to reviews
112 Reviews
Write a Review 

Boys' Gym T-Shirt Breathable Short-Sleeved S900,verdigris
Filtered by reviews Loading reviews…

Great value

icon-circle-checkmark verified purchase
Perfect T-shirt for sports & sumner

My son likes it very much. It’s very soft, thin & comfortable

icon-circle-checkmark verified purchase

buscaba comodidad y que secara rapido

icon-circle-checkmark verified purchase

muy transpirable

icon-circle-checkmark verified purchase

Transpira mientras hace deporte y es de fácil lavada

icon-circle-checkmark verified purchase

lo compre para mi hijo

icon-circle-checkmark verified purchase

Muy transpirable

icon-circle-checkmark verified purchase
Camiseta Junior Transpirable

Camiseta Transpirable de buena calidad, muy práctica para verano.

icon-circle-checkmark verified purchase
Muy fresco

Muy fresco

icon-circle-checkmark verified purchase

Muy recomendable

icon-circle-checkmark verified purchase
Ligera y transpirable

Perfecta para niños que hacen deporte de media intensidad

icon-circle-checkmark verified purchase

Es muy fresco y cómodo, ideal para la temporada

icon-circle-checkmark verified purchase
Niños camisetas

Buena calidad/precio Muy transpirable y comoda

icon-circle-checkmark verified purchase

Ideal para el día a dí del peque

icon-circle-checkmark verified purchase

Es supercomoda

icon-circle-checkmark verified purchase
Skip to reviews

Additional Product Information


Main fabric

  • 87% Polyester cationic
  • 13% Spandex

Shoulder fabric

  • 95% Polyester cationic
  • 5% Spandex

Our gym clothing is designed for kids aged 7 to 14: up to 5'8" for boys and 5'5" for girls

Our range is designed for sports activities at school or a children's gym. According to recommendations by the World Health Organization (WHO), children should do at least 1 hour of physical activity a day. The critical role of sport and its benefits for children's development and physical and mental well-being are proven: development of motor skills and agility, self-confidence, and belonging to a group

Physical education and sports activities allow children to burn off their energy and explore all the physical possibilities available to them: jumping, balancing, doing a series of movements and tricks. Moving, having fun, and enjoying sports with friends, all while following rules of life in a group, gym activities are accessible and have many benefits that both you and your child will enjoy!

The domyos product design process:

Our design teams work toward this single goal: providing a perfect balance of perspiration wicking, warmth and the need for stretch based on the needs of our young sports users. Your child will be able to choose their full gym outfit: T-shirt, tank top, leggings, bottoms, shorts, sweatshirt, and jacket.

A new sizing for children's clothing for physical education and sports beginning in january 2019:

We have improved the sizing on our clothing for ages 7 to 14. We present each product with its age range as well as the height of the child. We know that there are vast differences in height for children of the same age. Feel free to measure your child to see which model will fit them. We also offer an additional size for ages 14-15, to fit preteens: boys up to 5'8" and girls up to 5'5"

Did you know?

Our products are regularly tested and we make changes based on customer feedback.



Product testing

These tests are regularly performed by an independent laboratory and allow us to ensure that our quality standards are always upheld. This product has undergone washing and drying tests to verify that it retains its cut and color.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual