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Description
xThe Fastskin Junior LZR HyperPro is built to deliver the same performance as its adult counterpart, shaped specifically around a junior athlete’s body. Optimised seamlines and bonded dual-layer panels enhance fit and flexibility without compromising freedom of movement. The result is a suit that works with the swimmer, not against them, across every stroke and distance.
A soft Fastskin waistband with silicone gripper and crossover drawcord provides locked-in strength and a secure hold throughout a full race meet. Moderate compression supports muscles without excessive restriction, making it a practical choice for long competition days. Leg grippers keep the jammer firmly in place from the block to the finish wall.
LZR Pulse Fabric with durable wrapped yarns holds its shape session after session, resisting the distortion that can compromise fit and performance over time. An advanced water-repellent coating reduces drag at the surface, keeping the jammer performing as intended throughout a competition. This is a suit built to be race-ready not just once, but on repeat.
Not sure on sizing? See our Speedo Junior Fastskin LZR HyperPro Jammer Size Guide or ask our swimwear experts for advice.
← Scroll to see all sizes →
| Size | Size 24 | Size 26 | Size 28 | Size 30 |
|---|---|---|---|---|
| Age (guide only) | 7–8 yrs | 9–10 yrs | 11–12 yrs | 13–14 yrs |
| Body Measurements | ||||
| Waist cm | 61.0–64.0 | 65.0–69.0 | 70.0–74.0 | 75.0–77.0 |
| Waist inches | 24.3–25.3 | 25.8–27.3 | 27.5–29.3 | 29.5–30.3 |
| Hip cm | 70.0–74.5 | 75.0–79.0 | 80.0–83.0 | 84.0–87.0 |
| Hip inches | 27.5–29.3 | 29.5–31.0 | 31.5–32.8 | 33.0–34.5 |
All measurements are body measurements, not garment measurements. For further guidance view our full size guide or ask our swimwear experts.
Yes. The Fastskin Junior LZR HyperPro Printed Jammer has been fully approved by World Aquatics and is legal for use in sanctioned competition at all levels.
The Junior HyperPro shares the same look, feel, fabric, and performance benefits as the adult HyperPro suit, but is cut with a junior-specific fit to suit younger athletes’ body shapes more accurately.
Speedo sizing for competition jammers is based on waist and hip measurements rather than age. We recommend checking our Speedo Junior Fastskin LZR HyperPro Jammer Size Guide before ordering, as race suits are sized differently to training swimwear.
Rinse the jammer thoroughly in clean, cool water immediately after each session to remove chlorine. Avoid wringing, machine washing, or tumble drying. Full guidance is available in our full product aftercare guide.
View our full swimwear product aftercare guide to ensure you look after your kit properly.
Allens Swimwear is a family-run business founded in 1976 by Dennis Allen and his daughter Linda Beal. It started from a genuine need. “With 2 swimmers in the family it was often difficult to find the right kit, so dad and I took the plunge and started selling to local swimmers at our local pool in Kingsbury out of a suitcase and we’ve never looked back.” Today, Linda, her husband Richard, and three of their children Danny, Will and Jenna still run the business together. The suitcase may be long gone, but the founding principle of helping swimmers get the right kit remains exactly the same.
Shipping & Returns
xUK Delivery Options
🚚 Free UK Delivery
Free delivery on all orders over £40
For orders below £40, delivery charges will be displayed at checkout.
The total order value, including any deals or discounts (such as a discount code), must be over £40.
📮 Royal Mail
📦 UPS
🚀 DHL Courier
🏪 In Store Collection
Free in store collection is available. Simply choose this option at checkout and pick up your order at our store.
🕐 Delivery Times
EU Delivery Options
✈️ FedEx
International Delivery Options
🌍 International Shipping
📮 Royal Mail
🚀 DHL Courier
Important Information
FAQs
We offer several delivery options, including Standard Delivery, Express Delivery, and International Shipping.
Delivery times depend on the option you choose at checkout. Standard Delivery typically takes 2–3 days, while Express Delivery is usually delivered within 1–2 days. International delivery times may vary by location.
Delivery costs vary based on the shipping method and destination. Standard delivery starts at £4.99, and express delivery starts at £14.99. International shipping rates are calculated at checkout.
Yes, we offer free delivery on orders over £40. Terms and conditions apply.
Yes, once your order is dispatched, you'll receive a tracking number via email to monitor its progress.
Yes, we deliver to many countries worldwide. Delivery times and costs for international orders are shown at checkout.
If your order hasn't arrived within the estimated timeframe, please contact us with your order number, and we'll assist you.
If you're not available, the courier will typically leave a card with instructions on how to rearrange delivery or collect your parcel.
We can make changes to your delivery address if your order hasn't been dispatched. Please contact us as soon as possible.
If your order arrives damaged or is incomplete, please contact our customer service team as soon as possible with photos and your order number, and we'll resolve the issue promptly.
Currently, we don't deliver to PO Boxes and BFPO addresses. Please check specific delivery options at checkout.
For express or special deliveries, you may be able to select a preferred delivery date at checkout.
Returns Policy
We offer a free returns service. We advise that customers keep either proof of posting or a receipt as we cannot be held accountable for items lost being returned to us.
Please note that this returns policy does not cover items such as special order swimwear, customised products and products ordered specifically at the request of a customer. Products such as these cannot be returned (unless faulty).
Free UK Returns
If you are unhappy with your purchase for any reason, then we will gladly refund you within 28 days of purchase. Simply click on the link below to begin the returns policy:
ALLENS OF KINGSBURY RETURNS
Returns outside of the UK are at the buyer's cost. Please return to us at the address below.
Please ensure that you have completed a CN22 Customs declarations form and that this has been clearly marked as being Returned Goods. Please mark the return parcel on the outside clearly as returned goods. Failure to do this could result in Customs charges being applied to the parcel on its return. I regret we cannot accept parcels with customs duties and charges payable — these will be returned to sender.
Non-Faulty Goods
Please return items with the original packaging if possible and to keep hygiene seals on suits, please also include a copy of the invoice received clearly stating on this that you would like a refund for the return.
Please note that we will not accept non-faulty items back that have been worn or without their relevant packaging, labels or stickers.
If you would like to exchange an item for an alternative size, style or item please follow the link to us along with a copy of your invoice, please note on the invoice what item is required as an alternative.
Faulty Goods
In the case of faulty goods, please contact us and provide details of the nature of complaint along with photos and the date of purchase and the care given to product.
In all cases of complaint we will endeavour to substitute faulty goods with an identical replacement, or substitute the goods with ones of similar value. This does not affect your statutory rights, and you may of course choose to have a complete refund if you are not 100% happy.
How to Return an Item
If you have any questions about delivery, please contact us.
Size chart
This size guide covers the Speedo Fastskin LZR HyperPro Jammer — Boys' Junior, a World Aquatics approved competition racing jammer available in sizes 24–30 (ages 7–14). The LZR HyperPro delivers all-day comfort combined with moderate compression, engineered to work in synergy with the swimmer and built to last race after race. Designed for all ages, skill levels, strokes and distances.
Key features include comfortable compression engineered for comfort and performance, optimised seamlines and bonded dual layers designed and engineered for fit, flexibility and performance, a soft waistband with silicone gripper for easy comfortable fastening and a softer feel, and shape-retaining lightweight fabric with durable wrapped yarns and water repellant coating — built to last race after race. Fully approved by World Aquatics and developed by Speedo Aqualab. All measurements are body measurements taken from your child's body, not garment measurements.
Shop Kids Speedo Racing Jammers →
To find the correct LZR HyperPro Jammer size, use a soft measuring tape and take measurements directly against your child's skin. Age is shown as a guide only — always use body measurements, as children develop at very different rates. Use the hip measurement as the primary guide.
Note: Ages shown in the sizing table are a guide only. Always use body measurements to select the correct size. Children of the same age can vary significantly in size.
| Size 24 | Size 26 | Size 28 | Size 30 | |
|---|---|---|---|---|
| Age (guide only) | 7–8 yrs | 9–10 yrs | 11–12 yrs | 13–14 yrs |
| Body Measurements | ||||
| Waist cm | 61.0–64.0 | 65.0–69.0 | 70.0–74.0 | 75.0–77.0 |
| Hip cm | 70.0–74.5 | 75.0–79.0 | 80.0–83.0 | 84.0–87.0 |
| Size 24 | Size 26 | Size 28 | Size 30 | |
|---|---|---|---|---|
| Age (guide only) | 7–8 yrs | 9–10 yrs | 11–12 yrs | 13–14 yrs |
| Body Measurements | ||||
| Waist inches | 24.3–25.3 | 25.8–27.3 | 27.5–29.3 | 29.5–30.3 |
| Hip inches | 27.5–29.3 | 29.5–31.0 | 31.5–32.8 | 33.0–34.5 |
Ages shown are a guide only. Always use body measurements to select the correct size. All measurements are body measurements, not garment measurements.
Watch our step-by-step guide to taking accurate body measurements for the perfect LZR HyperPro Jammer fit.
Yes. The Speedo Fastskin LZR HyperPro Jammer is fully approved by World Aquatics (WA) and is legal for use in all sanctioned competitive swimming events. It has been developed by Speedo Aqualab and is built to compete at all levels of the sport. Always check with your event organiser for any local age group rules regarding tech suits in competition.
The LZR HyperPro Junior Jammer is available in sizes 24 to 30, covering an approximate age range of 7 to 14 years. However, age is a guide only — always use body measurements to select the correct size, as children of the same age can vary significantly in size. If your child's measurements fall between two sizes, speak to a member of staff at Allens for guidance.
The LZR HyperPro sits within the Fastskin racing range and is designed to deliver all-day comfort with moderate compression, making it suitable for all skill levels, strokes and distances. It features optimised seamlines, bonded dual layers, and a soft waistband with silicone gripper — built to last race after race. It is engineered to work in synergy with the swimmer and developed by Speedo Aqualab for performance at every level.
Always select by body measurements. The age ranges shown are a guide only — children develop at very different rates and age alone is not a reliable indicator of the correct size. Measure the waist and hip and compare to the sizing table above, using the hip measurement as the primary guide. Speak to a member of staff at Allens if you are unsure.
The LZR HyperPro Jammer should feel firm and compressive but comfortable throughout a full competition day. The soft waistband with silicone gripper should sit flat with no roll, the bonded seamlines should lie flat with no rubbing, and the suit should be completely wrinkle-free when correctly fitted. The leg hems should sit above the knee in line with WA regulations.
The Speedo Fastskin LZR HyperPro Jammer is designed for all competitive swimming events and all four strokes. It is specifically engineered to suit all skill levels, strokes and distances — making it an ideal choice for junior swimmers competing at club, county, or regional level who want a reliable, comfortable racing jammer that performs race after race.
Yes. The LZR HyperPro Jammer's moderate compression and comfortable fit make it an excellent choice for a junior swimmer's first Fastskin racing suit. The soft waistband with silicone gripper makes it easier to put on and wear throughout a full competition day compared to higher compression suits, while still delivering the performance benefits of a World Aquatics approved racing jammer.
The LZR HyperPro Jammer is a competition racing suit and is not designed for regular training use. Using it for training will degrade the water repellant coating and shorten the lifespan of the suit. Reserve it for races and competition warm-ups to maintain its performance. Speedo offer a wide range of junior training jammers for everyday training use.
The LZR HyperPro uses a shape-retaining lightweight fabric with durable wrapped yarns and water repellant coating, specifically designed to maintain its performance properties race after race. Unlike some higher-compression Fastskin suits, the HyperPro is engineered with durability in mind for all levels of competition use — making it a reliable investment for junior competitive swimmers.
Rinse the suit thoroughly in cold fresh water immediately after every use to remove chlorine and salt. Do not machine wash, tumble dry, iron, or dry-clean. Store the suit flat and dry, away from direct sunlight. Avoid contact with sun cream or petroleum-based products as these degrade the water repellant coating. Regular care after each use is essential to maximise the lifespan of the suit.
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