Our One Step Up top 2PK pink hearts and green sets are designed with a flexible fit. They are made of a soft, rib-knit fabric that is wonderful for layering. Each cotton t-shirt is made tag-free and offers a flexible fit. Our One Step Up tops provides a cooler, more comfortable alternative for an undershirt in warmer weather. Relatedly, our One Half Day option provides you with an extra day's supply of clothes, while our Two Day options provide two days' worth of clothes.