It is a type of material that stretches and is used especially for making clothes fit tightly.
Tee Jays TJ9510 - Lightweight performance softshell Men
MACRON MA5333J - Children's special sport boxer shorts
FLEXFIT FL7706RS - Recycled poly twill cap
MACRON MA5333 - Special sport boxer shorts
PROMODORO PM7830 - MEN'S LIGHT SOFTSHELL
PROMODORO PM7835 - WOMEN'S LIGHT SOFTSHELL
SOL'S 00604 - SOCCER Soccer Socks For Adults And Kids
Herock HK606 - Hypnos Thermal Legging