[AIR PRO TECHNOLOGY] - Born Tough Air Pro men's workout sleeveless shirts are constructed from a high-quality cloth known as Air Pro fabric which is composed of polyester and spandex; polyester makes up about 86% while spandex only comprises about 14% of the Air Pro fabric's composition; the polyester help give this athletic sleeveless gym shirts their elasticity, durability, and longevity, while the spandex is interweaved to help strengthen the seams when stretching.
[HONEYCOMB MESH] - Born Tough Air Pro athletic bodybuilding sleeveless shirts for men have their fabric built in a honeycomb mesh which improves breathability and freedom of movement; due to the honeycomb mesh being able to stretch to a degree without breaking, this will help reduce wind resistance and improve your body's aerodynamics while you are running; the porous nature of the honeycomb mesh contributes to the workout shirt's low weight and makes it better suited for indoor activities.
[EXTENDED BACK HEM] - Running sleeveless shirt for men are designed with an extended back hem to prevent the fabric from constantly riding up against your back; due to the extended back hem being slip-resistant, the fabric will remain comfortably about the back without constantly sliding or chafing against the surface of your skin; the back hem rests below the hips and can be tucked inside your pants or joggers which will help keep your bottom from being exposed.
[4-WAY STRETCH] - Born Tough Air Pro men's sleeveless workout shirts have highly elastic builds that make it easier for them to stretch around your body when being put on or removed; these running sleeveless gym shirts can have their outer surface pulled in any direction without fear of accidentally tearing or ripping the fabric; the flexible Air Pro fabric ensures that the shirt will stretch with your movements while you are engaged in intense exercises, such as running, bodybuilding, jumping
[FLATLOCK SEAMS] - Born Tough Air Pro sleeveless gym shirts for men have their fabric bound together by flatlock seams which help contribute to the Air Pro fabric's flexibility, strength, and longevity; the flatlock seams overlap between the polyester and spandex with single threads that make both materials stronger than they would have been by themselves; the flatlock seams along the inside of these athletic sleeveless shirts offer better comfort when pressed against your body.