T-shirts are great for everyday use. T-shirts can be worn under clothing as an undershirt, for sleeping or as a regular t-shirt. A great pumping alternative. We offer an undershirt for toddlers and older boys. On the toddler undershirts, pockets are located on the back, away from little hands. T-shirts with pockets on the front are intended for older boys. The Velcro seal makes it easy for parents to get to the pump. Comfortable undershirts are a great product for pumping.