in different shape,ie,with rounded top and straight bottom;or with both rounded top and bottom,
made of different materials,ie,non woven cloth,PEVA film,210D oxford cloth,190T taffeta,faille cloth,or cotton cloth,
with #3 or #5 full length central zip,
in different sizes,
printed with logo in 1 or 2 colours,by silk screen printing,or by heat-transferring printing.