Speedo Endurance+ Men’s Jammer Swim Trunks, Model 8-13447

Model: Speedo Endurance+ men’s jammer swim trunks are described as a streamlined training style with integral support and a drawstring waist. The listing also claims quick drying and chlorine resistance, while customer feedback flags inconsistent sizing and concerns about the drawstring staying in place.

At a glance

The product description presents these as a streamlined jammer for regular training sessions.
Integral support and a drawstring waist are built into the described design.
Speedo says the fabric is quick to dry and 100% chlorine resistant.
The manufacturer says one yarn in the Endurance+ fabric uses 100% post-consumer waste.

Price

£24.22Save 25%

Reference price: ~~£32.50~~

Price checked: 14 Nov 2026

View offer

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Pros and cons

Pros

The described cut, integral support and drawstring waist are aimed at regular swim training.
The manufacturer’s quick-drying and chlorine-resistance claims may suit frequent pool use.
Customer feedback is positive about swimming performance, appearance and drying time.

Technical specifications

10 specifications

Identity
Brand	Speedo
Model	8-13447
Department	Men's

Weight
Weight listed	1 kg

Design and use
Cut	streamlined cut
Support	integral support
Waist	drawstring waist

Fabric and care claims
Chlorine resistance	100% chlorine resistant
Drying	quick to dry
Recycled content claim	one of the yarns in our Endurance+ fabric is made from 100% post-consumer waste, such as recycled plastic bottles

What to know before buying

Customer feedback reports mixed sizing and durability experiences, with some saying the trunks run small or wear through quickly. The drawstring is also reported to come out easily during use, so consider fit carefully and check it remains secure. Manufacturer claims are not independent performance verification.

Who is it for?

A good fit for

Swimmers seeking a streamlined jammer with integral support for training.
Buyers who prioritise the manufacturer’s stated chlorine resistance and quick-drying fabric.

Less suited to

Buyers who need consistently confirmed sizing or durability based on the available customer feedback.
Anyone seeking swimwear without a drawstring waist.

Speedo Endurance+ Men’s Jammer Swim Trunks, Model 8-13447 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 2,501 ratings

5 stars72%72%
4 stars17%17%
3 stars5%5%
2 stars2%2%
1 star4%4%

Customer feedback highlights appearance, swimming performance and drying time as positives, alongside mixed views on sizing and how long the trunks last. Reports that the drawstring comes out easily are a practical concern for a design that relies on a drawstring waist. The generally positive overall rating distribution is encouraging, but it does not resolve those fit and durability differences.

Positive themes

Customers report positive impressions of appearance, swimming performance and drying time.

Negative themes

Customer feedback includes reports that the drawstring comes out easily during use.

Mixed feedback

Sizing feedback varies, with reports of both true-to-size fit and trunks running small.
Durability feedback is divided, with some describing them as robust and others reporting early wear.

Frequently asked questions

Are these trunks intended for regular swimming training?

The product description calls them ideal for regular training sessions and describes a streamlined cut with integral support.

Are they described as chlorine resistant?

Yes. The manufacturer claims the trunks are 100% chlorine resistant. This is a product claim, not an independently verified result.

What do customers report about fit and durability?

Feedback is mixed. Some find the sizing true to size while others say it runs small, and durability reports range from robust to wearing through quickly.

What should I know about the drawstring?

The design is described as having a drawstring waist. Customer feedback also includes reports that the drawstring can come out during use.