In American English, a gym bag or carryall is a large bag made of cloth or leather typically with a rectangular base and a zippered opening at the top.
A holdall (or occasionally hold-all) may be a similar bag but may often have wheels and possibly a telescopic handle.
The term covers a wide variety of types of bag.
Students, enrolled in military boarding schools in India, are issued a 'hold-all' to carry their blankets, quilts and clothes.
Once filled, it is rolled like a sleeping bag and held together with straps.