Some "boy cut" or bicycle-short style cheer underwear has the opposite problem of the bloomers - that is, the squared-off legs show under the hem of skirt, which again can be a bit of a stylistic blunder in terms of cheer.
In addition to the dress itself, the smallest sizes of Laura Ashley girls' sundresses come together with a matching set of bloomers or diaper cover to wear with the dress.
Cheerleading bloomers, generally referred to as "spankies" in cheer speak, are most often made of some combination of Lycra and polyester and will have the feel of spandex.
Some squads opt to get the same color bloomers for the entire squad, but the flyers may wear shorties, while girls who are bases might wear something that offers a tad more coverage.
Whether called "bloomers," "Spankies," or "dance pants," there is a particular style of undergarment that is produced to complement the uniform - coming in matching colors and usually accompanying the basic uniform.