Gym bags are required to be waterproof as going to the gym is not restricted to non-rainy weather. You can always find such gym bags through some clicks, and here is an assorted list of such bags you may find interesting.
The combination of black and gray is breathtaking, and when such a thing is incorporated in gym bags, using them becomes interesting. Look at the bag that comes with an adjustable strap, spacious compartments, and small handles.
The gray bag has a huge logo-type writing on the front. There are two side pockets in addition to the other obvious and regular features.
The colorful bag, exhibiting pink and black shades, is spacious enough to keep your gym essential in a proper way. The shoulder strap is detachable.