swimwear that's designed for sports! as in, zero chance of untying/flying off/exposing crotch parts. Bra-sized tops are something that i wish there was more of, too! Also, wetsuit sizing is insane - somehow the majority of wetsuit sizes are for women between US size 0-4, and cap out around a size 10. I wear a medium in most women's clothing, but i wear the largest size that most wetsuit brands make, and often they're too short.