Speedo Endurance Jammer: A Comprehensive Guide
Lead Consumer Product Specialist & Family Gear Director at US Family Mart Consumer Testing Lab · Certified Consumer Products Quality Specialist (CPQS), ASTM F15 Consumer Standards Member · 12+ years evaluating household appliances, smart home hardware, child safety equipment, and consumer lifestyle products.
The Speedo Endurance jammer is a men’s training swimsuit with a longer, knee-skimming leg, made from Speedo’s Endurance+ polyester fabric. It’s designed for frequent pool swimmers because the fabric is 100% chlorine resistant and Speedo says it lasts 20 times longer than conventional swimwear fabrics. It has a body-hugging fit with four-way stretch, a drawcord waist and a quick-drying finish. If you swim laps several times a week, it’s one of the most practical suits you can buy. If you only swim on vacation, a regular swim short will do.
| Feature | What Speedo says |
|---|---|
| Fabric | Endurance+ (about 50% polyester and 50% PBT polyester) |
| Chlorine resistance | 100% chlorine resistant |
| Durability | Designed to last 20x longer than conventional swim fabrics (Speedo claim) |
| Fit | Body-hugging, four-way stretch |
| Waist | Internal drawcord |
| Drying | Quick drying, low moisture absorption |
| Care | Hand wash cold, dry flat |
What Is a Jammer?
A jammer is a swimsuit that covers the hips and thighs, with a leg length from mid-thigh to around the knee. It sits between a brief (minimal coverage) and a board short (loose and baggy). Swimmers like it because it offers more coverage than a brief while staying close to the body, which reduces drag and keeps the suit from flapping in the water.
What Is Endurance+ Fabric?
Endurance+ is Speedo’s best-selling training suit fabric. Retailer listings describe it as a polyester and PBT polyester blend, roughly half and half. PBT is a stretchy polyester that resists chlorine, which is the main thing that destroys ordinary swimwear fabric over time.
What that means in practice:
- Chlorine resistance: Speedo calls it 100% chlorine resistant, so color and shape hold up under repeated pool exposure.
- Shape retention: The PBT blend keeps the stretch and the suit’s fit over time rather than sagging.
- Quick drying: The fabric has low moisture absorption, so it doesn’t stay waterlogged.
- Less stretch than nylon blends: Polyester feels a bit firmer than a nylon and elastane suit, which is part of why it lasts but also why sizing matters.
Speedo Endurance Jammer Versions
“Endurance” covers several versions of the jammer. Check which one you’re buying.
| Version | Notes |
|---|---|
| Solid Endurance / Endurance+ Jammer | The classic, in solid black or navy. Retailers list waist sizes from about 30 to 38 inches, and Speedo describes four-way stretch and a drawcord waist |
| Essential Endurance+ Jammer | A newer essentials line. Some listings describe it as ECO Endurance+, made from 50% recycled materials |
| ECO Endurance+ | Same chlorine resistance, with 50% recycled content |
| Endurance+ Max | Higher-end fabric. Speedo’s listings describe 100% post-consumer waste content and resistance to sunscreen, oil and pilling on some styles |
| Splice, Tech Panel and HyperBoom jammers | Same Endurance fabrics, with panels, prints or logos |
| Compress jammers | Endurance+ Max styles with a power mesh lining and a compression-style fit on some models |
Lining: It varies by style. Speedo Canada lists one Endurance jammer as fully lined, while a US marketplace listing for the classic Endurance+ jammer describes it as unlined. Check the product details if lining matters to you.
How Does the Speedo Endurance Jammer Fit?
- Snug, not loose: It’s meant to hug the body, with four-way stretch to move with you.
- Drawcord waist: The internal drawcord lets you fine-tune the fit.
- Leg length: Typically from mid-thigh down toward the knee, depending on the style.
- Sizing: Speedo sizes by waist. For a chart, see our Speedo Endurance jammer size chart guide. If you’re between sizes, most buyers do better sizing up, particularly because polyester has less give than nylon blends.
How Long Does It Last?
Speedo says Endurance+ lasts 20 times longer than conventional swimwear fabrics, but real life depends on how often you swim, how heavily the pool is chlorinated and how you care for the suit. Buyers who swim often generally report the suits staying looking new after many sessions, which fits the fabric’s reputation. Treat the “20x” figure as a manufacturer’s claim, not a guarantee.
How to Care for a Speedo Endurance Jammer
Even a chlorine-resistant fabric lasts longer with good care. Speedo and retailers recommend:
- Rinse in cold water after each swim to remove chlorine and chemicals.
- Hand wash cold, separately from other clothes.
- Use non-chlorine bleach only, and only when necessary.
- Dry flat in a ventilated area.
- Don’t tumble dry, iron or dry clean.
Avoid leaving a wet suit in a gym bag, since that can trap moisture and odor.
Speedo Endurance vs Other Speedo Jammers
| Endurance+ jammer | Dive and Medley jammers | |
|---|---|---|
| Fabric | Polyester and PBT polyester | Polyamide and elastane (nylon blend with CREORA HighClo) |
| Chlorine resistance | 100% chlorine resistant | High, but less than Endurance+ |
| Feel | Firmer, durable | Stretchier, softer |
| Best for | Frequent lap swimmers | Moderate pool use and comfort |
The Dive Jammer is listed as 80% polyamide and 20% elastane with CREORA HighClo, and the Medley Logo Jammer has the same blend with ECO EnduraFlex fabric.
If you swim several times a week, Endurance+ is the better value. If you want a stretchier, softer feel and swim less often, the nylon blend styles are a good alternative.
Price
Prices vary by style and country. In the listings we saw, the classic Endurance jammer appeared at roughly $43 (down from $55) at a US retailer and about £27 to £30 for Essential Endurance+ styles in the UK. Check the current price on your listing, and watch for sales.
Pros and Cons
Pros
- Extremely chlorine resistant and built for repeated pool use
- Holds its shape and color well
- Quick drying with low moisture absorption
- Four-way stretch and a secure drawcord waist
- More coverage than a brief and less drag than board shorts
- Eco versions use recycled fabric
Cons
- Firmer feel than a nylon-elastane suit
- Can feel too tight if you size down
- Lining varies by style
- Costs more than a basic swim short
- Fabric-life claims come from Speedo
Who Should Buy It?
It’s a great fit if you:
- Swim laps or train several times a week
- Want a suit that lasts through lots of chlorine
- Prefer a snug, low-drag fit with more coverage than a brief
Skip it if you:
- Swim only occasionally or mostly in the ocean
- Prefer a loose, board-short feel
- Want a very soft, stretchy fabric
FAQ
What is the Speedo Endurance jammer made of?
Speedo’s Endurance+ fabric, listed as about 50% polyester and 50% PBT polyester on the classic Solid Endurance jammer.
Is the Speedo Endurance jammer chlorine resistant?
Yes, Speedo describes it as 100% chlorine resistant.
How long does a Speedo Endurance jammer last?
Speedo says the fabric lasts 20 times longer than conventional swimwear fabrics, though real-world life varies.
Is the Speedo Endurance jammer lined?
It depends on the style, so check the product details.
Does the Speedo Endurance jammer have a drawstring?
Yes, many styles have an internal drawcord at the waist.
Can I put a Speedo Endurance jammer in the dryer?
No, Speedo’s care instructions say to hand wash and dry flat.
What size Speedo jammer should I buy?
Match your waist to Speedo’s size chart and size up if you’re between sizes.
What’s the difference between Endurance+ and Endurance+ Max?
Endurance+ Max is a premium version made from recycled materials that Speedo says also resists sunscreen, oil and pilling on certain styles.
Is the Speedo Endurance jammer good for competition?
It’s designed for training. For racing, check Speedo’s competition suits.
Final Thoughts
The Speedo Endurance jammer is a training suit built to last. If you swim regularly, the chlorine-resistant Endurance+ fabric, secure fit and quick-drying finish make it a smart buy, as long as you choose the right size and rinse it after each swim. Check the exact version and lining before you order.
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