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The Fossil Fuels

Lined Classic Swim Trunk

Current Price $79.50

A classic stretch trunk with built-in boxer brief liner

ColorTeal Waves/Jet Ski Dinosaurs
Inseam
Size
Mike (6'1") is wearing size M

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Easy returns & exchanges within 30 days
Product Details

Your swim trunks should do more than just survive a day in the water- they should keep up with you. Designed for movement, comfort, and all-day versatility. These lined swim trunks feature:

  • Quick-dry, lightweight fabric that keeps you cool and fresh
  • Four-way stretch so you can move freely, from beach to bar
  • Secure zippered back pocket to hold your essentials
  • Side mesh pockets for fast water drainage
  • Multiple inseam options for the perfect fit

Tough enough for adventure. Comfortable enough to wear all day. Stylish enough to never take off.

Best For:
Beach days, poolside lounging, vacations & resort wear, water sports & outdoor adventures, everyday summer style

Features

Fabric
A high-performance blend of polyester and spandex for flexibility, quick-drying comfort, and durability.

  • Shell: 92% Polyester/8% Spandex Blend.
  • Liner: 91% polyester / 9% spandex

Fit
A tailored cut designed to move with you, available in multiple inseam options to match your style and comfort preference

Features

  • Quick-dry, moisture-wicking fabric for all-day freshness
  • Four-way stretch that moves with you
  • Breathable construction to keep you cool
  • A chafe-free liner that lets you swim, lounge, and explore in total comfort
Shipping & Returns

Every order counts

Your purchase of this product supports Foundation 43's mission to expand access to mental health care and suicide prevention in the United States

Recommended For You

Lined Classic Swim Trunk

Our Lined Classic Swim Trunk is built for max comfort, stretch, and support whether you’re hitting the beach, the boat, or the backyard sprinkler.
With quick-dry fabric, a buttery-soft anti-chafe liner, and pockets that actually hold stuff, these trunks are ready for any adventure—wet or dry. Just add water (and maybe a frozen cocktail).

Quick Dry Fabric
4-Way Stretch
UPF 50+ Protection
Breathable Mesh Pockets

Ultra Supportive Fit
Anti-Chafe Liner
Elastic Comfort Waistband

Secure Zipper Back Pocket
Secure Drawstring

Quick Dry Fabric

Quick Dry Fabric

4 Way Stretch

4 Way Stretch

UPF 50+ Protection

UPF 50+ Protection

Breathable Mesh Pockets

Breathable Mesh Pockets

Fabric & Performance

Quick Dry Fabric
4-Way Stretch
UPF 50+ Protection
Breathable Mesh Pockets

Ultra Supportive Fit

Ultra Supportive Fit

Anti-Chafe Liner

Anti-Chafe Liner

Elastic Comfort Waistband

Elastic Comfort Waistband

Fit & Comfort

Ultra Supportive Fit
Anti-Chafe Liner
Elastic Comfort Waistband

Secure Zipper Back Pocket

Secure Zipper Back Pocket

Secure Drawstring

Secure Drawstring

Function & Details

Secure Zipper Back Pocket
Secure Drawstring

Quick Dry Fabric

Quick Dry Fabric

4 Way Stretch

4 Way Stretch

UPF 50+ Protection

UPF 50+ Protection

Breathable Mesh Pockets

Breathable Mesh Pockets

Quick Dry Fabric

Quick Dry Fabric

4 Way Stretch

4 Way Stretch

UPF 50+ Protection

UPF 50+ Protection

Breathable Mesh Pockets

Breathable Mesh Pockets

Ultra Supportive Fit

Ultra Supportive Fit

Anti-Chafe Liner

Anti-Chafe Liner

Elastic Comfort Waistband

Elastic Comfort Waistband

Secure Zipper Back Pocket

Secure Zipper Back Pocket

Secure Drawstring

Secure Drawstring

Quick Dry Fabric

Quick Dry Fabric

4 Way Stretch

4 Way Stretch

UPF 50+ Protection

UPF 50+ Protection

Breathable Mesh Pockets

Breathable Mesh Pockets

Fabric & Performance

Quick Dry Fabric
4-Way Stretch
UPF 50+ Protection
Breathable Mesh Pockets

Ultra Supportive Fit

Ultra Supportive Fit

Anti-Chafe Liner

Anti-Chafe Liner

Elastic Comfort Waistband

Elastic Comfort Waistband

Fit & Comfort

Ultra Supportive Fit
Anti-Chafe Liner
Elastic Comfort Waistband

Secure Zipper Back Pocket

Secure Zipper Back Pocket

Secure Drawstring

Secure Drawstring

Function & Details

Secure Zipper Back Pocket
Secure Drawstring

Overall rating: 4.8798103 / 5 from 3378 reviews.

AI Generated Review Summary

The Fossil Fuels 4" Classic Lined Swim Trunks are praised for their perfect fit, high-quality material, and vibrant colors. Customers love the design and comfort, making them a top choice for swimwear.

Summary topics

  • Fit (23%): Many customers remarked that the fit of the swim trunks was perfect, with multiple reviews mentioning it.
  • Quality (8%): Customers expressed appreciation for the great quality of the product, which was mentioned multiple times in the reviews.
  • Design (5%): It was noted by customers that the design of these swim trunks is loved and highly recommended.
  • Colors (7%): Customers appreciated the great and vibrant colors of the product, which were mentioned multiple times in the reviews.
  • Liner Comfort (16%): A significant amount of customers expressed satisfaction with the liner, describing it as comfortable, cool, and amazing.

Review topics: [color, movement, feel, problem, fit, look, quality, shorts, design, length, material, trunks, pattern, style, size, liner, comfort, fabric, pockets, swimsuit, stretch, boys, customer service, chubbies, waist, wife, cut, bathing suit, build, value].

Review highlights

  • "great shorts fit great look good" — Ruben
  • "Great design, great fit, and the liner feels great." — Chris S.
  • "The length and fit is PERFECT and the colors look so good on him!" — Grace P.

Reviews

Perfect length and fit - fun lining

"My 10-year-old outgrew his brand new Chubbies from Easter this year! They were too short (I didn't realize we needed the longer ones) and just didn't fit, so sadly we can't wear those anymore, but sizing up was the right move - we got two pairs recently and both fit him great with plenty of room to move and grow."

— Carmen F. (5/5)

I received a pair of

"I received a pair of Chubby’s swim trunks for my birthday. I liked them so much, I bought 3 more pairs. They fit great & wash well. I would definitely recommend them . ."

— Carol M. (5/5)

Good quality product that fits

"Good quality product that fits perfectly and looks great."

— Carter M. (5/5)

So comfy!!!!

"Loved these! Especially the boxer brief liner. Makes it much more versatile and comfortable in cases where you want to bike around and swim in a beach area."

— AG (5/5)

great shorts, but prefer no

"great shorts, but prefer no liner."

— Thomas C. (5/5)

These are my new favorite

"These are my new favorite swim shorts."

— Tony P. (5/5)

I couldn't be happier! Basically

"I couldn't be happier! Basically i am thrilled with this swimwear! I haven't felt like this in many many years! Very comfortable, no restriction at all! Amazing colours and design! Will definitely buy a second one soon!!"

— Antonios D. (5/5)

Great fit good product

"Great fit good product"

— Robert W. (5/5)

Excellent purchase

"I really like the material used for the shorts and the liner. The shorts dry very quickly, while the liner is very soft and stays put. Great shorts!"

— Jason T. (5/5)

Go to swimsuit

"Amazing suit! These are the only swimsuits I wear now. Super comfortable and never chafe. I hike with these around Iona’s swimming at various swimming spots along the way and never need to swap out because there is no chafe. They have some great patterns to choose from too."

— Blaze A. (4/5)

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