Allover Challenge Back XTR BB30-named for its required spindle

BB30-named for its required spindle size-narrows Q-factor

a technical innovation that redefines the concept of inner tubes

Weight: 540g

Hidden bolt design

Does NOT include bounce back

Allover Challenge Back XTR BB30-named for its required spindleArriving Spring 2026 The Arena Women's Allover Challenge Back One Piece Swimsuit is built to handle frequent swimming, training, and pool practice with a durable construction that retains its shape. Features Durable and quick drying Thin straps Open back Details Fabric: 100% Polyester Care: Hand wash cold, hang dry Sun Protection: UPF 50+ Chlorine Resistant: Yes Fit: Competitive