
Arena
Graded Open-Back Swim One-Piece
The Arena Graded Open-Back Swim One-Piece is a women's chlorine-resistant training swimsuit built from a lined performance weave with soft, unpadded cups for natural shaping and non-adjustable shoulder straps. It features a high rounded neckline, large curved side cutouts, an open back with narrow double straps joining a T-shaped back connector, a bikini cut, and a center back seam, with neon yellow binding along the neckline, straps, cutout edges, and leg openings. The body has a vertical red-to-purple gradient and a printed arena logo with a three-diamond mark at the upper chest; it is intended for pool swimming and repeat training use where chlorine exposure occurs.
- Material
- Chlorine-resistant weave with lining
- Gender
- female
- Style
- performance, sporty
- Category
- Apparel & Accessories > Clothing > Swimwear
Color
Specifications
Open-back one-piece swimsuit with chlorine-resistant fabric, soft unpadded cups, and a bikini cut.
Chlorine-resistant weave with lining; soft unpadded cups for natural shaping; non-adjustable straps; backless design; bikini cut.
- Material
- Chlorine-resistant weave with lining
- Style
- performance, sporty
- Occasion
- beach-day, vacation
- Gender
- female
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Swimwear
Additional Attributes
- one-piece swimsuit silhouette
- open-back backless design
- chlorine-resistant fabric weave
- fully lined interior
- soft unpadded cups
- natural shaping through unpadded cup construction
- non-adjustable straps
- bikini-cut leg openings
Product Insights
Training/practice suit, not a race-day tech suit Body and lining are 100% polyester, with no elastane Chlorine-resistant weave built for regular chlorinated pool use Open-back design with fixed, non-adjustable narrow straps and a high neckline Non-adjustable straps mean no post-purchase tension tuning; narrow straps may concentrate shoulder pressure Torso length is the critical one-piece measurement; sizing guidance is split on whether to size up or down
Verified claims
- product_type
- Training/practice suit, not a race-day tech suit
- material_composition
- Body and lining are 100% polyester, with no elastane
- chlorine_resistance
- Chlorine-resistant weave built for regular chlorinated pool use
- lining_opacity
- Fully lined for coverage and reduced transparency
- cup_support
- Soft, unpadded cups provide natural shaping with minimal added structure
- open_back_design
- Open-back design with fixed, non-adjustable narrow straps and a high neckline
- strap_fit_tradeoff
- Non-adjustable straps mean no post-purchase tension tuning; narrow straps may concentrate shoulder pressure
- cut_and_coverage
- Large side cutouts and a bikini-cut leg create a high-cut, backless silhouette
- color_styling
- Red-to-purple gradient body with neon yellow binding and Arena logo; listed color is Assorted
- sizing_and_availability
- Sizes 32, 34 and 36 are all in stock at a flat 120 CAD
- torso_length_fit
- Torso length is the critical one-piece measurement; sizing guidance is split on whether to size up or down
- coverage_via_cut
- Do not size up for more coverage; the fabric will likely gap and lose support
- wet_fit_behavior
- The knit stretches when wet, so the suit should feel snug but not tight on dry land
- construction_seams
- Seamless front with a visible center back seam and bound edges
- care_instructions
- Rinse immediately after every swim, gentle wash, no bleach/softener/dryer/iron/dry clean/soak, air-dry away from heat and sun, never store wet
- avoid_lotions
- Avoid body lotions, creams, deodorants, makeup and perfume
- suitable_uses
- Best for lap swimming, team practice, drills, speed work and aquagym
- value
- 120 CAD buys a lined, chlorine-resistant Arena training suit with flat pricing across sizes
- comparison_racing
- Lacks the bonded seams, compression panels and water-repellent coatings of a Powerskin-style racing suit
- comparison_elastane
- 100% polyester resists chlorine better than elastane blends but feels firmer and less soft-stretchy
Product record
- Title
- Graded Open-Back Swim One-Piece
- Brand
- Arena
- Price
- 120 CAD
- Availability
- In stock
Buying Guide
1 comparison · 11 sourcesUses
Intended for natural bust shaping
The swim one-piece features soft, unpadded cups. These cups are designed with the stated purpose of providing natural shaping.[1]
Product comparison
Compared within this brand.
| Graded Open-Back Swim One-Piece: Choose this if you are looking for a striking design featuring a smooth vertical color gradient that transitions from bright red at the chest to a blue-violet tone toward the lower torso and hips. This open-back suit offers soft, unpadded cups for natural shaping and includes large kidney-shaped cutouts exposed by a T-shaped back connector. The entire design is accented by narrow, contrasting neon yellow binding and is constructed from a chlorine-resistant, 100% polyester weave.[1,2,3,4] | Logo Swim One-Piece: Choose this if you want a chlorine-resistant, 100% polyester training one-piece that is front-lined for conservative coverage, with soft unpadded cups for natural shaping and wide straps meant for ease of movement and a secure fit. Its racerback has a large rounded lower-back cutout, and the bikini cut sits high on the hips; Arena describes the fit as a second skin that reduces water drag. Note that one swimmer reported sizing runs a little tighter than some brands (swimsuits tend to loosen over time), and an Arena suit owner found theirs comfortable but said it started disintegrating fairly quickly.[5,6,7,8,9,10,11] |
Image Analysis
3 images- 01

Product
Front view of a one-piece swimsuit with high neckline, side cutouts, yellow binding, and a top-center logo on a red-to-purple gradient body.
- Overall silhouetteOne-piece swimsuit shown on a model from the front with a high, rounded neckline, moderate leg cut, and symmetrical curved side cutouts exposing the wearer's waist on both sides.
1 region
x 0.18 · y 0.12 · w 0.64 · h 0.78 (high) - Neckline and strapsHigh rounded neckline with narrow shoulder straps that continue into the back; neckline and straps are edged with a narrow bright yellow binding.
1 region
x 0.30 · y 0.08 · w 0.40 · h 0.18 (high) - Side cutoutsLarge kidney-shaped cutouts on both sides of the torso, edged with the same narrow yellow binding as the neckline.
2 regions
x 0.22 · y 0.36 · w 0.16 · h 0.34 (high); x 0.62 · y 0.36 · w 0.16 · h 0.34 (high) - Waist to hip seamless joinFront shows a continuous single-piece construction with no visible seams or closures across the torso in the visible area.
1 region
x 0.30 · y 0.30 · w 0.40 · h 0.50 (medium) - Front logo“arena”
1 region
x 0.36 · y 0.18 · w 0.28 · h 0.08 (high) - Front logo markThree diamond-shaped mark under the word arena
1 region
x 0.40 · y 0.24 · w 0.20 · h 0.06 (high) - Fabric gradientSmooth vertical gradient on the swimsuit body transitioning from bright red at the chest to purple and then to a blue-violet tone toward the lower torso and hips.
1 region
x 0.24 · y 0.16 · w 0.52 · h 0.64 (high) - Binding at leg openingsLeg openings trimmed with the same bright yellow narrow binding visible at the neckline and cutouts.
1 region
x 0.32 · y 0.70 · w 0.36 · h 0.20 (high)
Other
Studio shot of a model against a soft light gray to white gradient background with even frontal lighting and minimal shadows.
- Model and poseFemale model standing facing forward with arms relaxed; left hand resting against thigh and right hand slightly away from body.
1 region
x 0.12 · y 0.06 · w 0.76 · h 0.88 (high) - BackgroundPlain studio background with a subtle light gray vignette toward the edges and white center behind the model.
- Lighting and shadowsEven frontal lighting with soft shadows, slight specular highlights on the model's skin indicating diffuse studio light sources.
- Image crop and framingImage is a mid-to-full body crop from just above the head to upper thighs, centered on the model.
Colors
bright red· upper body fabricblue violet· lower body fabricmagenta purple· mid torso gradientneon yellow· binding and trimsneon yellow· logo and mark- Overall silhouetteOne-piece swimsuit shown on a model from the front with a high, rounded neckline, moderate leg cut, and symmetrical curved side cutouts exposing the wearer's waist on both sides.
- 02

Product
Side view of a one-piece swimsuit on a model showing a high neckline, large cutout open sides, graded color body and contrasting narrow trim; leg openings and armhole edges visible with neon trim and a small logo on the chest.
- SilhouetteOne-piece swimsuit shown in side profile on a model with a high, rounded neckline, wide shoulder straps, large curved open side cutout exposing waist and back area, and a moderate-cut leg opening.
1 region
x 0.18 · y 0.10 · w 0.54 · h 0.80 (high) - Color gradientSwimsuit body shows a smooth vertical gradient that transitions from a warm red/pink at the chest and upper torso to a purple/blue at the hip and lower body.
2 regions
x 0.20 · y 0.12 · w 0.40 · h 0.40 (high); x 0.20 · y 0.50 · w 0.45 · h 0.30 (high) - Contrast trimNarrow neon yellow-green binding runs around the neckline, shoulder straps, armhole, side cutout edge, and leg openings creating a sharp contrast against the gradient body.
3 regions
x 0.34 · y 0.08 · w 0.30 · h 0.12 (high); x 0.56 · y 0.30 · w 0.18 · h 0.28 (high); x 0.24 · y 0.70 · w 0.40 · h 0.18 (high) - Chest logo“Small printed logo at upper chest consisting of lowercase text and two small geometric mark(s) below it, in the same neon yellow-green as the trim.”
1 region
x 0.33 · y 0.18 · w 0.18 · h 0.07 (high) - Material appearanceFabric appears smooth and form-fitting with a slight sheen consistent with swim fabric; no visible texture or seams other than binding edges.
1 region
x 0.22 · y 0.14 · w 0.44 · h 0.66 (high) - Model interactionRight hand is positioned pulling slightly at the swimsuit near the right hip opening, creating a small horizontal pull wrinkle at the side seam.
1 region
x 0.54 · y 0.64 · w 0.18 · h 0.12 (high) - Visible cutout shapeSide cutout has a continuous curved opening edged with the neon binding, forming an elongated teardrop shape between bust and hip.
1 region
x 0.40 · y 0.28 · w 0.30 · h 0.46 (high)
Other
Studio-style image showing a model in side profile against a plain light neutral background with soft, even lighting and minimal shadows; image cropped to show from head to upper thigh.
- BackgroundPlain light gray to off-white seamless background with no visible props or scenery.
- LightingSoft, even studio lighting from the front-left producing gentle, diffuse shadows on the model's right side and under the arm.
- Shot framingVertical crop showing the model from the top of the head to the upper thighs in a three-quarter side profile pose facing left.
- Image qualitySharp focus on the model and swimsuit with no visible motion blur and natural color rendering.
Colors
gradient red-pink· upper body gradientpurple-blue· lower body gradientneon yellow-green· binding and logo- SilhouetteOne-piece swimsuit shown in side profile on a model with a high, rounded neckline, wide shoulder straps, large curved open side cutout exposing waist and back area, and a moderate-cut leg opening.
- 03

Product
Rear three-quarter view of a one-piece open-back swimsuit on a model. The suit shows a pink upper section, a purple lower section with a graded transition, and a narrow neon yellow binding along straps, back cutout edge, waist and leg openings.
- Overall silhouetteOne-piece swimsuit with a high-cut leg line and a large open-back cutout that connects straps to the lower back band, shown on a standing model from the rear three-quarter angle.
1 region
x 0.18 · y 0.06 · w 0.64 · h 0.88 (high) - Back cutout and strap shapeNarrow double shoulder straps converge into a rounded T-shaped back connector that frames a wide open-back area; straps are edged with a contrasting narrow trim.
1 region
x 0.40 · y 0.08 · w 0.30 · h 0.34 (high) - Upper body colorUpper torso/front panel visible at the sides appears as a solid medium pink tone.
1 region
x 0.30 · y 0.12 · w 0.22 · h 0.32 (high) - Lower body gradientLower half of the suit shows a purple color that appears graded, with slightly lighter shading toward the center back seam.
1 region
x 0.28 · y 0.50 · w 0.44 · h 0.34 (high) - Contrast bindingNarrow neon yellow binding trims the straps, the edges of the back cutout, the waistband line and the leg openings.
1 region
x 0.38 · y 0.08 · w 0.30 · h 0.64 (high) - Center back seamA visible vertical seam or stitch runs down the center of the lower back panel of the suit.
1 region
x 0.52 · y 0.52 · w 0.06 · h 0.28 (medium) - Material appearanceFabric has a smooth, slightly shiny swimwear texture consistent with performance swim fabric.
1 region
x 0.30 · y 0.12 · w 0.44 · h 0.72 (medium)
Other
Studio shot showing a model against a plain light gray to white background with soft, even lighting and subtle shadowing on the model's left side. Image is cropped to show the model from head to upper thighs; model's hair is tied back in a low ponytail and she wears a single small earring on the visible ear.
- Shot compositionModel is positioned three-quarter rear with head turned slightly to the left, occupying the central vertical area of the frame.
1 region
x 0.18 · y 0.02 · w 0.64 · h 0.96 (high) - Background and lightingPlain light gray to white seamless background with even studio lighting and soft shadows along the model's contours.
- Model stylingModel wears a low ponytail and a small hoop earring on the visible ear; hands relaxed at sides.
2 regions
x 0.56 · y 0.04 · w 0.24 · h 0.18 (high); x 0.24 · y 0.78 · w 0.24 · h 0.18 (high) - Image cropFrame includes model head down to upper thighs; lower legs and feet are outside the image.
Colors
medium pink· upper torso panelvivid purple· lower torso and seatneon yellow· strap and edge binding- Overall silhouetteOne-piece swimsuit with a high-cut leg line and a large open-back cutout that connects straps to the lower back band, shown on a standing model from the rear three-quarter angle.