Front view of women's SI One-Piece Rashguard long sleeve swimsuit made from recycled ocean plastic

Blue SI One-Piece Rashguard sustainable women's rashguard swimsuit

SI Surface Inetrval one piece rashguard for women

Women's blue one-piece rashguard swimsuit by Surface Interval made from recycled nylon, front view

Back view of SI One-Piece Rashguard Black women's sustainable swimwear with long sleeves and athletic fit

Close-up of black back detail on SI One-Piece Rashguard women's sustainable rashguard

Close-up of Blue black detail on SI One-Piece Rashguard women's sustainable rashguard swimsuit

Close-up of Blue back detail on SI One-Piece Rashguard women's sustainable rashguard

Front view of SI One-Piece Rashguard Black women's sustainable swimwear with long sleeves and athletic fit

Blue bodysuit with long sleeves on a light gray background

SI One-piece Rashguard

Regular price Rs. 4,199.00

India's First Women's Long Sleeve Rashguard Made from Ocean Plastic | UV Protection & Sustainable Swimwear

The SI One-Piece Rashguard is Surface Interval's first women's rashguard — a long sleeve, front-zip one-piece built from regenerated ocean plastic, designed for diving, surfing, snorkelling, and every ocean adventure in between. Ghost nets, single-use plastics, and submerged waste are recovered and transformed into high-performance regenerated polyamide yarn the strength and stretch of virgin nylon, with a fraction of the footprint.

Secure front zip, contrast white piping, full arm coverage, and the signature SI wave logo. One suit. Every ocean. No compromises. Pro tip: Size up for a looser fit!

Why You'll Love It

UV Protection Full UV & UVB protection, coral-reef safe.
Chlorine Resistance Built for pools and open water.
Shape Retention Bi-elastic stretch that keeps its form.
Muscle Support Built-in compression for underwater performance.
All-Day Comfort Soft against skin, dawn dives to sunset sessions.
Pilling Resistant Looks good for years.

Every purchase plants a baby coral fragment in Bali through our partners at Living Seas. For ocean lovers, by ocean lovers.

Color :

Black Blue

Size :

XS S M L

Size Guide

Size Guides

Our custom SI cuts and fits are designed for the Indian body. They follow the general India sizing guide with slight tweaks for a better and a more custom fit, they are a slightly cropped than the standard unisex t-shirts with relatively longer sleeves.

Steps to find your right size:

1. Start by choosing a t-shirt from your wardrobe whose fit you love

2. Measure and note the shoulders from hem to hem and then the chest width on one side and multiply that by 2

3. Refer to our size chart to match your measurements to select the size that best aligns with your garments dimensions.

SI One-piece Rashguard size chart:

Size (inch)	US	UK	Length (inch)	Chest (inch)	Sleeve Length (in)	Hip(in)
XS	4	8	25	30-32	27	32 – 34
S	6	10	26	32-34	29	34 – 36
M	8	12	27	34-36	29	36 – 38
L	10	14	28	36-38	30	38 – 40

>>> Chest and Hip ranges show garment flat measurement → maximum stretch fit at 10%. For the best fit, your body measurement should fall within the range shown. SI One-piece rashguard is meant to be a tight fit. Size up for a looser fit!

Size (cm)	Length (cm)	Chest (cm)	Sleeve Length (cm)	Hip(cm)
XS	63.5	76–81	68.6	81–86
S	66	81–86	73.7	86–91
M	68.6	86–91	73.7	91–97
L	71.1	91–97	76.2	97–102

Oceanic Human 2.0 rashguard size chart:

Size (inch)	US	UK	Length (inch)	Chest (inch)	Sleeve Length (inch)
XS	4	8	25	36	28 ½
S	6	10	26	38	29
M	8	12	27	40	29 ½
L	10	14	28	42	30
XL	12	16	29	44	30 ½

Size (cm)	Length (cm)	Chest (cm)	Sleeve Length (cm)
XS	63.5	91	72
S	66	96	74
M	68.6	102	75
L	71	106	76
XL	74	111	77

Oceanic Human (version 1) rashGuard size chart:

Size (inch)	Length (inch)	Chest (inch)	Sleeve Length (inch)
XS	24	36	27
S	25	38	28
M	26	40	29
L	27	42	30
XL	28	44	31

Size (cm)	Length (cm)	Chest (cm)	Sleeve Length (cm)
XS	61	91.5	68.5
S	63.5	96.5	71
M	66	101.5	73.5
L	68.5	106.5	76
XL	71	112	78.5

Surface Interval oversized fit guide (garment size):

Size (inch)	Shoulder (inch)	Sleeves (inch)	Chest (inch)	Length (inch)
S	19	10.5	42	26.5
M	20	11.5	44	27.5
L	21	12.5	46	28.5
XL	22	13.5	48	30

Size (cm)	Shoulder (cm)	Sleeves (cm)	Chest (cm)	Length (cm)
S	48.3	26.7	106.7	67.3
M	50.8	29.2	111.8	69.9
L	53.3	31.8	116.8	72.4
XL	55.9	34.3	121.9	76.2

Regular fit size chart:

Size (inch)	Shoulder (inch)	Chest (inch)	Length (inch)	Sleeve (inch)
XS	14	34	25	7.5
S	16	36	26	8
M	17.5	39	27	8.5
L	19	42	28	9
XL	20.5	44	29	9.5

Size (cm)	Shoulder (cm)	Chest (cm)	Length (cm)	Sleeve (cm)
XS	35.6	86.4	63.5	19.1
S	40.6	91.4	66	20.3
M	44.5	99.1	68.6	21.6
L	48.3	106.7	71.1	22.9
XL	52.1	111.8	73.7	24.1

Tank top size chart:

Size (inch)	Chest (inch)	Length (inch)
XS	36	25.5
S	38	26
M	40	27.5
L	42	28
XL	44	29

Size (cm)	Chest (cm)	Length (cm)
XS	91.4	64.8
S	96.5	66
M	101.6	69.9
L	106.7	71.1
XL	111.8	73.7

SI Basic Tee size chart:

Size (inch)	Chest (inch)	Length (inch)
S	42	28
M	44	29
L	46	30
XL	48	31

Size (cm)	Chest (cm)	Length (cm)
S	106.7	71.1
M	111.8	73.7
L	116.8	76.2
XL	121.9	78.7

Please note:

• If you prefer a looser fit, please go a size up

• The above sizes may vary to the slightest from the chart to the actual product

• All products may shrink after wash

Material

78% regenerated polyamide (ocean plastic) · 22% elastane · OEKO-TEX Standard 100 Certified

Care

To keep your sustainable rashguard performing season after season: rinse in cold fresh water immediately after use, hand wash with a gentle, reef-safe detergent, and lay flat to dry in the shade. Avoid wringing, tumble drying, or prolonged sun exposure when not in use. No bleach, no fabric softeners. Treat it well and your ocean plastic swimwear will hold its shape, colour, and compression for years.

SI One-piece Rashguard - Black / XS

Rs. 4,199.00

Color

Size

About Sustainability

Built from the Ocean. Built for the Ocean.

The SI One-Piece Rashguard is India's first women's long-sleeve rashguard made from regenerated ocean plastic ghost nets and submerged waste transformed into high-performance recycled swimwear. Designed for diving, surfing, snorkelling, and open-water swimming, it delivers full UV and UVB protection, chlorine resistance, and bi-elastic compression in a single sustainable suit. Every SI rashguard is OEKO-TEX Standard 100 certified and coral-reef safe because the ocean we protect is the ocean we swim in.

Surface Interval was created out of our passion for the ocean, and sustainability is at the heart of everything we do.

Each month we help plant minimum on 36 coral fragments.

All of our products are crafted in small batches and limited quantities. This approach helps us maximize usage and reduce the risk of microplastics. Plus, our eco-friendly packaging is plastic-free, reusable, and recyclable.

Our rashguard is made from materials that once threatened marine life—single-use plastics, ghost nets, and recycled ocean waste.

All products

Rashguards

T-Shirts & Tank Tops

Ocean Lifestyle

SI One-piece Rashguard

SI One-piece Rashguard - Black / XS