Added security and back support for added comfort and ease of use. Easy to take on and off and easy to store. Machine washable. * No buckles, rings, snaps, clasps or bulky padding. Specially designed to distribute weight on both shoulders with greater back and shoulder support. * Made of entirely 100% cotton knit fabric with cross stretch. Soft breathable, machine washable and dryer safe. * Creates ideal environment for disabled pets or pets with special needs. 4 comfortable positions to conveniently carry pets in style. * Sizes are for the person carrying the pet. Carrier is durable enough to carry pets from birth to 25 lbs.