It is a type of material that stretches and is used especially for making clothes fit tightly.
Tee Jays TJ9510 - Lightweight performance softshell Men
BUILD YOUR BRAND BY099 - Women's leggings
FLEXFIT FX5003 - Cotton bob
Lemon & Soda LEM1400 - Underwear Boxer for him
Lemon & Soda LEM3985 - Shirt Poplin LS for her
Lemon & Soda LEM3986 - Shirt Poplin SS for her
Lemon & Soda LEM3985C - Shirt Poplin LS for her
Lemon & Soda LEM3627 - Jacket Hooded Softshell for her