Arena Powerskin Impulso Womens Size Guide

This size guide covers the Arena Powerskin Impulso Women’s Kneesuit — the perfect solution for the swimmer seeking an affordable entry into performance racing swimwear. The Impulso’s woven fabric is designed to give moderate compression, supporting the muscles and improving the hydrodynamic position of the body in the water.

Its lightweight and quick-drying properties, together with a hydrophobic treatment and flat surface, minimise water absorption and surface resistance to further improve hydrodynamics. The Impulso is an excellent choice for swimmers competing regularly at club level who want a performance suit at an accessible price point. All measurements are body measurements taken directly from your body. Use your Torso Loop (D) as the primary sizing guide.

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Body Measurement Points

How to Measure

Take all measurements directly against your skin using a soft tape measure. Use the Torso Loop (D) as the primary sizing guide — this determines how the suit sits across the shoulders and through the body.

A
ChestMeasure around the fullest part of your chest, keeping the tape horizontal and snug but not tight.
B
WaistMeasure at the narrowest part of your natural waist.
C
HipMeasure around the fullest part of your hips and seat, keeping the tape horizontal.
D
Torso LoopMeasure over one shoulder, down the front, under the crotch and back up to the same shoulder.

If measurements fall between sizes, use the Torso Loop as the primary guide. Speak to a member of staff at Allens if you are unsure.

Sizing Table — Arena Powerskin Impulso Women's

Sizing	18	20	22	24	26	28	30	32	34
International Size Equivalents
UK	18	20	22	24	26	28	30	32	34
USA	18	20	22	24	26	28	30	32	34
France	24	26	28	30	32	34	36	38	40
Italy	28	30	32	34	36	38	40	42	44
Germany	22	24	26	28	30	32	34	36	38
Body Measurements (cm)
A — Chest	69–74	74–79	79–84	84–89	89–94	94–98	98–102	102–106	106–110
B — Waist	54–58	58–62	62–66	66–70	70–74	74–78	78–82	82–86	86–90
C — Hip	70–75	75–80	80–85	85–90	90–95	95–100	100–105	105–110	110–115
D — Torso Loop	116–123	125–133	136–143	146–153	156–163	166–173	171–178	176–183	181–188
Body Measurements (inches)
A — Chest	27.2–29.1	29.1–31.1	31.1–33.1	33.1–35.0	35.0–37.0	37.0–38.6	38.6–40.2	40.2–41.7	41.7–43.3
B — Waist	21.3–22.8	22.8–24.4	24.4–26.0	26.0–27.6	27.6–29.1	29.1–30.7	30.7–32.3	32.3–33.9	33.9–35.4
C — Hip	27.6–29.5	29.5–31.5	31.5–33.5	33.5–35.4	35.4–37.4	37.4–39.4	39.4–41.3	41.3–43.3	43.3–45.3
D — Torso Loop	45.7–48.4	49.2–52.4	53.5–56.3	57.5–60.2	61.4–64.2	65.4–68.1	67.3–70.1	69.3–72.0	71.3–74.0

All measurements are body measurements, not garment measurements. Use the Torso Loop (D) as the primary sizing guide. Speak to a member of staff at Allens if you are unsure.

Fit Notes — Arena Powerskin Impulso Women's

Use the Torso Loop (D) as the primary sizing guide — this determines how the suit sits across the shoulders and through the body.
If your measurements fall between sizes, speak to a member of staff at Allens who will be happy to advise on the best fit.
The moderate compression of the Impulso makes it an accessible entry point into performance racing suits — it should feel supportive and close-fitting without being uncomfortably tight.
The hydrophobic surface treatment minimises water absorption — avoid contact with sunscreen, oils, and petroleum-based products which can degrade this treatment.
The flat surface construction should lie smooth against the skin — any wrinkling or lifting indicates the suit is too large.
The suit should be completely wrinkle-free when correctly fitted — any bunching or gathering indicates the suit is too large.
Allow 10–15 minutes to put on correctly for the first time. Take care with fingernails and jewellery to protect the fabric.
Do not use sunscreen, oils, or petroleum-based products before putting on the suit as these degrade the fabric.
Rinse in cold fresh water immediately after each use. Do not machine wash, tumble dry, iron, or dry-clean.
Unsure? Contact our team or call +44 1827 330600. Speak to a member of staff at Allens if you are unsure.

Frequently Asked Questions — Arena Powerskin Impulso Women's

Measure your chest (A), waist (B), hip (C), and torso loop (D) using a soft tape measure directly against your skin. Use the Torso Loop as the primary guide and compare all measurements to the sizing table above. Speak to a member of staff at Allens if you are unsure.

The Torso Loop is measured by running a soft tape measure over one shoulder, down the front of the body, under the crotch, and back up to the same shoulder. This is the most important measurement for a racing suit as it determines how the suit sits across the shoulders and through the body.

If your measurements fall between two sizes, speak to a member of staff at Allens who will be happy to advise on the best fit for you. Arena racing suits are designed to fit closely — a suit that fits correctly should feel firm and supportive without restricting breathing or movement.

A tech suit should feel firm and compressive but wearable throughout a full competition day. It should be completely wrinkle-free when correctly fitted — any bunching or gathering indicates the suit is too large. The suit should feel tight but should not restrict breathing or cause pain. Seams and panels should lie flat with no rubbing or pressure points.

Arena racing suits are competition suits and are not designed for regular training use. Using a tech suit for training will degrade the fabric and reduce its lifespan significantly. Reserve it for races and competition warm-ups. Arena offer a wide range of training swimsuits for everyday pool use.

Rinse the suit in cold fresh water immediately after every use. Do not machine wash, tumble dry, iron, or dry-clean. Store flat and dry, away from direct sunlight. Avoid contact with sunscreen, oils, and petroleum-based products. Do not wring or twist the suit. Handle with care when putting on and taking off to protect the fabric.

Arena racing suit sizes (18–34) do not directly correspond to standard clothing sizes. Always use body measurements to select the correct Arena size. The international size equivalents shown in the table (France, USA/UK, Italy, Germany) are provided as a secondary reference — always prioritise body measurements.

Yes — the Arena Powerskin Impulso meets FINA/World Aquatics specifications and is approved for use in all sanctioned competitive swimming events. Always check with your event organiser for any local rules regarding tech suits in competition. Speak to a member of staff at Allens if you need further guidance.