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STRETCH YOUR STORY

ButterFlow™ Square Neck Longline Bra B/C Cups

Total price

$42.00 $60.00

Designed for running and high-intensity training, ButterFlow™ offers medium support with a secure, non-restrictive fit. Featuring a cool-touch, sweat-wicking fabric, its longline silhouette, square neckline, and cross-back design deliver added coverage, clean stability, and full shoulder mobility as intensity rises.

Color: Oatmeal Beige

Gracen is 5'10" wearing S

Size: S
Size Guide

SUPPORT LEVEL

Medium support designed for gym training, running, and high-movement workouts. Fits best when you choose the size that matches your underbust measurement.

Quantity:

Total price

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Pre-order Information

Please review before placing your order.

  • Pre-ordered items are expected to ship in early June, but may ship sooner.
  • If your order includes both pre-order and in-stock items, available items will be shipped separately at no additional cost.
  • Pre-order items cannot be canceled after purchase, but returns are available after delivery according to our return policy.

Free standard shipping on all U.S. orders.

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Size Guide

Leggings
Pants
Sports Bras
Jackets & Tops

Size chart

in

cm

Size
US Size
Waist
Hip

XS

S

M

L

XL

2XL

3XL

0

2-4

6-8

10

12-14

16

18-20

25

27

29

31

33 1/2

36

39

34 1/2

36 1/2

38 1/2

40 1/2

43

45 1/2

48 1/2

Size
US Size
Waist
Hip

XS

S

M

L

XL

2XL

3XL

0

2-4

6-8

10

12-14

16

18-20

63.5

68.5

73.5

78.8

85

91.5

99

87.5

92.5

97.8

103

109.5

115.5

123

Size
US Size
Waist
Hip

XS

S

M

L

XL

2XL

0

2

4

6-8

8-10

12

26

26 3/4

28 1/4

30

32

34

34 1/2

35 1/2

37

38 1/2

40 1/2

42 1/2

Size
US Size
Waist
Hip

XS

S

M

L

XL

2XL

0

2

4

6-8

8-10

12

66

68

72

76

81

86

88

90

94

98

103

108

Size
US Size
Hip

XS

S

M

L

XL

2XL

3XL

0

2-4

6-8

10

12-14

16

18-20

34 1/2

36 1/2

38 1/2

40 1/2

43

45 1/2

48 1/2

Size
US Size
Hip

XS

S

M

L

XL

2XL

3XL

0

2-4

6-8

10

12-14

16

18-20

87.5

92.5

97.8

103

109.5

115.5

123

Size chart

in

cm

Size
US Size
Waist
Hip

XS

S

M

L

XL

2XL

0

2-4

6-8

8-10

12-14

16

25

27

29

31

33 1/2

36

34 1/2

36 1/2

38 1/2

40 1/2

43

45 1/2

Size
US Size
Waist
Hip

XS

S

M

L

XL

2XL

0

2-4

6-8

8-10

12-14

16

63.5

68.5

73.5

78.8

85

91.5

87.5

92.5

97.8

103

109.5

115.5

Size chart

in

cm

Size
US Size
Under Bust
Chest

XS

S

M

L

XL

2XL

0

2-4

6-8

10-12

12-14

16

27 1/2

28 1/2

30

31 1/2

33 1/4

35 1/4

32 1/4

34

36

38

40

42 1/2

Size
US Size
Under Bust
Chest

XS

S

M

L

XL

2XL

0

2-4

6-8

10-12

12-14

16

70

72.5

76.5

80.5

84.5

89.5

82

86.5

91.5

96.5

101.5

108

Size chart

in

cm

Size
US Size
Chest
Waist

XS

S

M

L

XL

2XL

2

4

6-8

10-12

12-14

16

32

34

36

38

40 1/2

43

25

27

29

31

33 1/2

36

Size
US Size
Chest
Waist

XS

S

M

L

XL

2XL

2

4

6-8

10-12

12-14

16

81.5

86.5

91.5

96.5

103

109.5

63.5

68.5

73.5

78.8

85

91.5

How to measure

How to measure
Bust
  • Place the measuring tape around the fullest part of your chest directly under your arms.

  • Waist
  • Measure around your natural waistline at belly button level.

  • Hip
  • Measure around the fullest part of your body at the top of your leg.

  • Inseam
  • With no shoes on, measure from the groin down to the floor.

  • Pants
    Joggers & Sweatpants
    Tops
    Button Downs

    Size chart

    in

    cm

    Size
    Waist
    Hip

    28

    30

    31

    32

    33

    34

    36

    38

    28

    30

    31

    32

    33

    34

    36

    38

    34 1/2

    36 1/2

    37 1/2

    38 1/2

    39 1/2

    40 1/2

    42 1/2

    43 1/2

    Size
    Waist
    Hip

    28

    30

    31

    32

    33

    34

    36

    38

    71

    76

    78.5

    81.5

    84

    86.5

    91.5

    96.5

    84.5

    92.5

    95.5

    98

    100.5

    103

    108

    110.5

    Size chart

    in

    cm

    Size
    Waist
    Hip

    XS

    S

    M

    L

    XL

    28 1/2

    30 1/2

    32 1/2

    34 1/2

    38 1/2

    35

    37

    39

    41

    44

    Size
    Waist
    Hip

    XS

    S

    M

    L

    XL

    72.5

    77.5

    82.5

    87.5

    97.5

    89

    94

    99

    104

    111.5

    Size chart

    in

    cm

    Size
    Chest
    Waist

    XS

    S

    M

    L

    XL

    2XL

    36

    38

    40

    42

    45

    49

    28 1/2

    30 1/2

    32 1/2

    34 1/2

    38 1/2

    42

    Size
    chest
    Waist

    XS

    S

    M

    L

    XL

    2XL

    91.5

    96.5

    101.5

    106.5

    114.5

    124.5

    72.5

    77.5

    82.5

    87.5

    97.5

    106.5

    Size chart

    in

    cm

    Size
    Chest
    Waist
    Sleeve

    XS

    S

    M

    L

    XL

    2XL

    36

    38

    40

    42

    45

    49

    28 1/2

    30 1/2

    32 1/2

    34 1/2

    38 1/2

    42

    31 1/2

    32 1/4

    33

    33 3/4

    34 1/2

    35

    Size
    Chest
    Waist
    Sleeve

    XS

    S

    M

    L

    XL

    2XL

    91.5

    96.5

    101.5

    106.5

    114.5

    124.5

    72.5

    77.5

    82.5

    87.5

    97.5

    106.5

    80

    82

    84

    86

    87.5

    89

    How to measure

    Chest
  • Place the measuring tape around the fullest part of your chest directly under your arms.

  • Waist
  • Measure around your natural waistline at belly button level.

  • Hip
  • Measure around the fullest part of your body at the top of your leg.

  • Sleeve
  • Measure from center back neck to wrist.

  • ButterFlow™ Square Neck Longline Bra B/C Cups

    color :

    Just added

    Free Crew Socks on orders $150+, $15 off on orders $300+
    Orders $150+: Free Crew Socks, $300+: $15 off

    Recently Viewed

    Designed for running and high-intensity training, ButterFlow™ offers medium support with a secure, non-restrictive fit. Featuring a cool-touch, sweat-wicking fabric, its longline silhouette, square neckline, and cross-back design deliver added coverage, clean stability, and full shoulder mobility as intensity rises.

    Designed for running and high-intensity training, ButterFlow™ offers medium support with a secure, non-restrictive fit. Featuring a cool-touch, sweat-wicking fabric, its longline silhouette, square neckline, and cross-back design deliver added coverage, clean stability, and full shoulder mobility as intensity rises.

    KEY FEATURES

    Icons_Outlined (3).png__PID:cd2e077c-277f-47fc-a1cf-e91fabd67bc6

    KEY FEATURES

    Icons_Outlined (6).png__PID:8a755709-a166-4040-ae3c-e0284709f60b

    ButterFlow™ fabric

    Medium support

    Longline style

    Cool-touch feel

    Breathable mesh lining

    Square neckline

    Cross-back design

    Wide, stay-flat straps

    Removable pads

    SIZE GUIDE

    Icons_Outlined (3).png__PID:cd2e077c-277f-47fc-a1cf-e91fabd67bc6

    SIZE GUIDE

    Icons_Outlined (6).png__PID:8a755709-a166-4040-ae3c-e0284709f60b

    Size Guide

    in

    cm

    Size
    US Size
    Under Bust
    Chest

    XS

    S

    M

    L

    XL

    2XL

    0

    2-4

    6-8

    10-12

    12-14

    16

    27 1/2

    28 1/2

    30

    31 1/2

    33 1/4

    35 1/4

    32 1/4

    34

    36

    38

    40

    42 1/2

    Size
    US Size
    Under Bust
    Chest

    XS

    S

    M

    L

    XL

    2XL

    0

    2-4

    6-8

    10-12

    12-14

    16

    70

    72.5

    76.5

    80.5

    84.5

    89.5

    82

    86.5

    91.5

    96.5

    101.5

    108

    MATERIAL & CARE

    Icons_Outlined (3).png__PID:cd2e077c-277f-47fc-a1cf-e91fabd67bc6

    MATERIAL & CARE

    Icons_Outlined (6).png__PID:8a755709-a166-4040-ae3c-e0284709f60b

    Material

    • Fabric: Nylon (TACTEL®) 83% Polyurethane (LYCRA®) 17% / Lining: Nylon (TACTEL®) 88%, Polyurethane (LYCRA®) 12%

    Care

    colors (4).png__PID:69731a5b-7978-4acf-86b4-ef3528ff13fb

    Wash with like colors (may bleed)

    do-not-wash (3).png__PID:ef3528ff-13fb-483d-ad90-74ba2a906545

    Do not soak

    detergent (2).png__PID:74ba2a90-6545-4b7c-80f6-ac8c5261c4c9

    Use mild detergent

    wash-gentle-30 (2).png__PID:ac8c5261-c4c9-4183-a915-5438235d783c

    Wash cold (86°F or below)

    do-not-dry-in-dryer (2).png__PID:5438235d-783c-4970-8924-758a7688c825

    Do not tumble dry

    do-not-dry-clean (2).png__PID:758a7688-c825-4b02-8b5f-ce2aa5942f64

    Do not dry clean

    remove-pads.png__PID:809fea67-6f0f-43c2-bc05-d003e7b13818

    Remove bra pads before wash

    SHIPPING & RETURN

    Icons_Outlined (3).png__PID:cd2e077c-277f-47fc-a1cf-e91fabd67bc6

    SHIPPING & RETURN

    Icons_Outlined (6).png__PID:8a755709-a166-4040-ae3c-e0284709f60b

    Shipping

    Standard shipping: $5

    Express shipping: $15

    Free shipping

    Free standard shipping on orders over $50

    Free express shipping on orders over $200

    Returns

    Returns are accepted within 30 days with a $10 return fee. If your order included a free gift, please return it with the item.

    스크롤핸들.png__PID:8d172acb-b729-4fc0-9663-fb0df1a6bcdf

    Product key features

    Icons_Outlined (7).png__PID:9f0fd1f3-21d5-447e-8dae-f468b47b148eIcons_Filled (1).png__PID:9c5f37e1-e694-4bc0-849e-052bca3209dc

    Fabric

    Size & Fit

    Shipping & Return

    Material & Care

    Product Details

    ButterFlow™ Square Neck Longline Bra B_C Cups_1.jpg__PID:41f750da-a59f-4b6c-bfdd-bb3b00ece1f1

    ButterFlow™ Performance Fabric

    Lightweight and cool to the touch, ButterFlow™ is engineered for breathability and resilient stretch—designed to move smoothly with your body during training.

    ButterFlow™ Square Neck Longline Bra B_C Cups_2.jpg__PID:f750daa5-9f2b-4c7f-9dbb-3b00ece1f1dc

    Wide Straps + Cross-Back

    Wide straps and a cross-back layout provide balanced stability while helping distribute pressure evenly across the shoulders.

    Airhole Bra Pads.jpg__PID:cfb8d435-6cef-4876-9f5f-93623fc4483c

    Removable Pads for Performance

    Soft, breathable pads are designed to stay in place during movement. Ensure the SYS symbols are centered when inserting the pads.

    Experience ButterFlow™
    Designed and made in Korea with 8 distinct styles from supportive bras and shorts to high-rise, flared, and wide silhouette bottoms.

    DISCOVER BUTTERFLOW™

    Good Matches

    Overall rating: 3.0 / 5 from 3 reviews.

    AI Generated Review Summary

    Summary topics

    Review topics: [].

    Review highlights

    Reviews

    Purchased white, size medium. I

    "Purchased white, size medium. I am 5’8, 140 lbs with 34C bra and broad shoulders. The top is very comfortable, but the front puckers along the top line. I have worn the top 3 times to hot yoga. It does not dry as fast as the leggings, but the straps are very comfortable when on my back. Higher rating would require better fit over chest and better wicking and drying capabilities."

    Sarah D. (3/5)

    Sleek, Stretchy, and Ready to Move

    "I'm 5'7" and wearing my usual size S. The clean, minimal square neckline gives a flattering shape, and the stretchy fabric makes it effortless to put on and take off. It's great for pilates, gym sessions—even light runs. (This review was written by SYS crew. )"

    Angie (5/5)

    "Neckline is wiggling and inner bra cups are keep coming out!"

    Namhee (1/5)

    Q&A

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