Arena Powerskin ST Next Mens Size Guide

This size guide covers the Arena Powerskin ST Next Men’s Jammer — the next generation of Arena’s iconic ST racing suit and the first ever World Aquatics (FINA) approved racing suit made with recycled fabrics. Made from over 60% recycled fibre from waste yarns, the ST Next celebrates sustainability without compromising on performance.

The new fabric is significantly lighter and faster, absorbing less water and reducing drag for longer-lasting compression and enhanced durability race after race. Designed with low-profile seams for perfect fit and outstanding freedom of movement. World Aquatics (FINA) approved. All measurements are body measurements taken directly from your body. Use your Hip (B) as the primary sizing guide.

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Body Measurement Points
Arena Arena Powerskin ST Next Men's body measurement points — waist and hip
How to Measure

Take all measurements directly against your skin using a soft tape measure. Use the Hip (B) as the primary sizing guide.

  • A
    WaistMeasure at the narrowest part of your natural waist, keeping the tape horizontal and level.
  • B
    HipMeasure around the fullest, widest part of your hips and seat, keeping the tape horizontal.

If measurements fall between sizes, speak to a member of staff at Allens who will be happy to advise on the best fit.

Sizing Table — Arena Powerskin ST Next Men's
Sizing 22 24 26 28 30 32 34
International Size Equivalents
UK 22 24 26 28 30 32 34
USA 22 24 26 28 30 32 34
France 55 60 65 70 75 80 85
Italy 36 38 40 42 44 46 48
Germany 00 0 1 2 3 4 5
Body Measurements (cm)
A — Waist 65–70 70–75 75–80 80–85 85–90 90–95 95–100
B — Hip 80–85 85–90 90–95 95–100 100–105 105–110 110–115

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

Fit Notes — Arena Powerskin ST Next Men's
  • Use the Hip (B) as the primary sizing guide — the jammer needs to seat correctly over the hips before the waistband can sit flat.
  • 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 recycled eco-friendly fabric is lighter and faster than the previous ST generation — the suit should feel close-fitting and supportive with excellent freedom of movement.
  • Low-profile seams should lie completely flat against the skin with no rubbing or pressure points during competition.
  • The ST Next’s longer-lasting compression means the suit retains its compressive properties for longer than many competing suits when properly cared for.
  • The suit should be completely wrinkle-free when correctly fitted — any bunching or gathering indicates the suit is too large.
  • The waistband should sit flat with no rolling or gaps. Leg hems should end above the knee in line with World Aquatics regulations.
  • 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 ST Next Men's

Measure your waist and hip using a soft tape measure directly against your skin. Use the hip measurement as the primary guide and compare both measurements to the sizing table above. Speak to a member of staff at Allens if you are unsure.

Measure your waist (A) at the natural waist point and your hip (B) at the widest point, keeping the tape horizontal and level. Both measurements should be taken directly against your skin with no clothing. Use the hip as the primary sizing guide.

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 jammers are designed to fit closely — a suit that fits correctly should feel firm and supportive without restricting breathing or movement.

A tech suit jammer 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 waistband should sit flat with no rolling, and leg hems should end above the knee.

Arena racing jammers 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 jammers 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.

Arena racing suit sizes (22–34) 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, UK, USA, Italy, Germany) are provided as a secondary reference — always prioritise body measurements.

Yes — the Arena Powerskin ST Next meets FINA/World Aquatics specifications and is approved for use in all sanctioned competitive swimming events. It is also notable as the first ever World Aquatics approved racing suit made with recycled fabrics. Always check with your event organiser for any local rules regarding tech suits in competition.