Materials vary by style but commonly include 100% recycled polyester, nylon blends (for example 80% nylon/20% spandex), and polyester/elastane blends (for example 83% polyester/17% elastane). Some items also list a 100% polyester lining.
Most watermelon swim options list UPF 50+ sun protection. Some descriptions explicitly state that UPF 50+ blocks about 98% of harmful UV rays.
Available sizes cover both infant and toddler ranges. Examples in these listings include 12M and 12–18M, 18–24M, 2T, 3T, 4T, and items labeled as 3 Toddler.
Closures vary by style: many pieces are pull-on; some one-piece rash guards use quarter zippers with snaps for easier changing; others list a front full-length zipper.
Several listings highlight 4-way stretch or describe the fabric as soft and stretchy, indicating the swimsuits are designed for flexibility and freedom of movement.
Rashguard sets in these listings typically include two pieces: a rashguard top and matching bottoms.