Heavy Absorbency

Leakproof Bikini

Name: Leakproof Bikini
Brand: Athleticus Research
Price: 52.0 CAD
Availability: InStock
Rating: 5.0 (60 reviews)

$52 CAD

Absorbency

SIZE

size chart

Fit Tips:

If your body measurements fall on the borderline between two sizes, we recommend sizing up for a more comfortable fit. If your hip and waist measurements suggest different sizes, choose the size that matches your larger measurement.

How to Measure:

Bust Place the measuring tape around the fullest part of your bust.

Waist Stand up straight and place the measuring tape around your natural waist.

Hips Measure around the fullest part of your hips.

Inseam Measure from the crotch seam down to the hem of the pants.

Size Chart

	Pant	Waist (in)	Hip (in)
XS	00-0	20"-23"	28"-31"
S	0-2	24"-27"	32"-35"
M	4-6	28"-31"	36"-39"
L	8-10	32"-34"	40"-42"
XL	12-14	35"-37"	43"-45"
XXL	16	38"-40"	46"-48"

Item is in stock Only 0 left in stock Item is out of stock Item is unavailable

CORE:TX™ 9.0 is the best teammate when you're working up a sweat. Created with multi-layer high absorption fibres to match your peak performance while offering uncompromised comfort and protection, no matter what activity you're doing.

Mid-rise, moderate coverage with a waistband that rests below the natural waistline. Fits snug at first but conforms to your body with wash and wear.

Wash with like colours. Hand wash or machine wash in cold water. Avoid washing at high temperatures to prevent peeling of adhered fabric. Do not use bleach or fabric softeners. Use wash bag. Do not tumble dry.

Body: 71% Nylon, 29% Spandex
CORE:TX™ 9.0 Gusset Layer 1: 91% Polyester, 9% Spandex
CORE:TX™ 9.0 Gusset Layer 2: 100% Polyester
CORE:TX™ 9.0 Gusset Layer 3: 71% Nylon, 29% Spandex, PU Film

Risk-Free Guarantee Risk-Free Guarantee

Experience CORE:TX™ Leakproof Underwear with confidence—enjoy a 30-day money-back guarantee.*

How It Works:

Choose Your Style: Add one CORE:TX™ Leakproof Underwear to your cart - available in Bikini, Boyshort, High Rise, or Thong, in any size and absorbency.
Checkout: Complete your order with Standard or Expedited shipping.
Try It: Experience the comfort, quality, and convenience of our CORE:TX™ Leakproof Underwear.
Get a Refund: If unsatisfied, request a refund (excluding shipping) within 30 days of receiving your order through our Return Center. You keep the underwear.

*Terms and conditions apply. Learn more here.

Shipping & Returns Shipping & Returns

Free standard shipping for orders over $50.
Within 30 days of delivery, you may return or exchange. The underwear item must be unworn, unwashed, and in its original condition with all tags and packaging intact.
Please see our Return & Exchanges policy here.

5.0

Rated 5.0 out of 5 stars

60 Reviews

Complete the look

Leakproof High Rise

$44 CAD

Everyday Performance Crew Socks

$18 CAD

Compact Carry Case Set

$50 CAD

Bought together

ABSORBENT

MOISTURE-WICKING

WORRY-FREE BACKUP

SUSTAINABLE

CORE:TX™ System

3.0 features Razor-Thin Integrated Gusset for discrete and comfort even for everyday use.

5.0 and 9.0 underwear features Secure+ Floating Gusset for extra protection and provides a sleeve for disposable and reusable pads.

Other Brands

Other brands utilize common honeycomb fabric that absorbs liquid slowly, causing smears and overall dampness.

Sharp edges from machine-pressed glued edges harden over time and dig into your skin throughout the day.

CORE:TX™ Technical Fabrics

Our instant pass-through fabric technology locks in instantly to keep you feeling fresh and dry throughout the day.

Ultra-soft wrapped edges provides soft and smooth feel keeping you comfortable all day long.

CORE:TX™ 9.0 shown.

360 Liquid Barrier.

Utilizing advanced water-proof stitching techniques and wrapped edges, the 360 Liquid Barrier provides double the leakproof performance while staying soft and comfortable.

RINSE. WASH. REPEAT.

Caring for your CORE:TX™ is simple. Quick rinse with cold water to remove any stains. Machine wash cold on a gentle cycle. Air dry to ensure longevity.

Reality Check.

Single-use products use over one million litres of water for production and generates over one million tons of waste each year. This waste can stay in landfills for up to 800 years.

Our commitment to the environment.

Caring for the environment is a responsibility we all share. Our biodegradable packaging ensures that once it’s done protecting your underwear, it returns to the earth without leaving a lasting footprint.

Bundles and Kits

Love your underwear and want more? Looking for different absorbencies to complete your set? Check out Bundles and Kits for tailored sets and discounts.

Visit Bundles and Kits

5.0

Rated 5.0 out of 5 stars

Based on 60 reviews

Total 5 star reviews: 57 Total 4 star reviews: 3 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0

100%would recommend these products

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60 reviews

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Liza F.
Verified Buyer
1 week ago
Reviewing
Leakproof Bikini
Rated 5 out of 5 stars
Washing made all the difference!
At first, I was a bit disappointed because the fit was tighter than I expected. But after washing them, they softened and stretched just enough to fit like a glove. The fabric seems to adjust after washing, and now they’re super comfy. I’m glad I gave them a chance!
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Katilyn
Verified Buyer
1 week ago
Reviewing
Leakproof Bikini
Rated 5 out of 5 stars
Excellent
The bikini style is lightweight, breathable, and absorbent. They’re comfy and stay in place all day, but I recommend sizing up for a better fit.
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Ella
Verified Buyer
2 weeks ago
Reviewing
Leakproof Bikini
Rated 5 out of 5 stars
5 Stars
The different absorbency levels are perfect for managing my period, giving me the right protection no matter my flow.
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