Speedo Womens One Piece Endurance+ Cross Back Solid (Style 9NNF)

In this review of the Speedo Womens One Piece Endurance+ Cross Back Solid, the bottom line is simple: this is a dependable training suit for swimmers who want long-term chlorine resistance and a comfortable range of motion. Built from Speedo's Endurance+ fabric and fully lined in black, it is aimed at regular lap swimmers, team practices and masters programs who need a suit that holds its shape through repeated sessions. The cross back design gives freedom of movement without excess drag, making it a practical choice for workouts rather than fashion-only use.

Key Features

• Endurance+ fabric: Provides strong chlorine resistance so the suit maintains color and fit after repeated pool sessions.
• Fully lined in black: Ensures coverage and opacity for confidence during workouts and helps the suit retain structure over time.
• Cross back design: Allows a greater range of shoulder motion for flips, turns and sustained strokes without feeling restrictive.
• Color block styling: Delivers a clean, athletic appearance that looks intentional at practice or in a team setting.
• Durable construction: Materials and seams are built for frequent use so the suit stands up to season-long training.

Who It's For

The Speedo Endurance+ one piece is best for regular swimmers, swim team members and fitness swimmers who put in many pool hours and need a suit that resists chlorine and keeps its shape. Its combination of durable fabric and a cross back fit makes it well suited to people training for races, maintaining fitness or attending structured practices.

Swimmers seeking a fashion-forward beachwear piece or those who require highly adjustable straps or a very loose, casual fit should look elsewhere. Also, buyers sensitive to tight fits should consult sizing guidance carefully, since customer feedback on fit and strap length is mixed.

Pros & Cons

Pros

• Strong chlorine resistance from Endurance+ fabric helps maintain color and elasticity.
• Cross back cut offers unhindered shoulder movement for competitive strokes.
• Fully lined construction gives reliable opacity and a more finished interior feel.
• Clean, athletic appearance that works well for team colors and training sessions.

Cons

• Sizing can run small for some customers, so certain buyers may find it tighter than expected.
• Strap length and stretch receive mixed reviews, so those needing a custom fit may need to try sizes.

Specifications

Brand	Speedo
Fabric	Endurance+ chlorine resistant fabric
Construction	Fully lined in black
Back style	Cross back
Intended use	Training and competitive swim practice
Packaging	Will ship in a competitive box

Our Verdict

The Speedo Endurance+ cross back one piece is a solid value for swimmers who need a durable, chlorine-resistant training suit with good freedom of movement. While sizing varies among buyers, its lasting fabric and lined construction make it a practical purchase for regular pool use and team programs.

Frequently Asked Questions

Is this suit good for regular lap swimming?
Yes, the Endurance+ fabric and cross back fit are designed for frequent pool use and training sessions.

Will the suit remain opaque after many wears?
It is fully lined in black, which helps maintain opacity and coverage through repeated use.

Should I size up if I am between sizes?
Many customers report mixed sizing, so shoppers who prefer a less snug fit may want to try the next size up.