Story
Our favorite swim trunk and all-day active short—in one
The same Wellen trunk you came to love is now part of the Proof family, and newly updated with a hidden side-zip pocket. The Performance Lined Swim is a new category of swim trunks. These are two shorts in one; we took our favorite swim shorts and all-day active shorts and combined them to create the perfect short for all-day adventures in and out of the water. We’re talking 4-way stretch fabric to power everything from longboard sessions to yoga to surf ‘n turf workouts, an ultra-soft liner used by elite triathletes, and everyday carry pockets. And thanks to the versatile style and modern fit, it looks great with slides and a short sleeve button down to pull double duty for a concert or date night. We call it the swim trunk killer.
Features
- Modernized classic fit with a comfortable elastic waistband and drawcord
- 5" inseam with four-way stretch fabric for surfing, paddling, stretching, and training
- Made from recycled poly (water bottles) and spandex with UPF 50+ protection
- Ultra-soft, quick-dry liner (inspired by performance bike bibs) with hidden phone pocket
- Mesh-lined side pockets with hidden AirPods sleeve
- Back snap pocket with key bungee and reflective hit, plus a new hidden side zip pocket
Sizing
- The Performance Lined Swim Trunks run true to size. Order your standard pant or short size.
- Still not sure what size to buy? Grab a pair of shorts at home to compare to the garment measurements below:
Garment Measurements
|
XS |
S |
M |
L |
XL |
XXL |
| Waist |
28¼ |
30¼ |
32½ |
34½ |
37 |
40 |
| Thigh |
12½ |
13 |
13½ |
14⅛ |
14⅛ |
15⅝ |
| Leg Opening |
11⅛ |
11½ |
11⅞ |
12⅜ |
13 |
13⅝ |
| Inseam |
5 |
5 |
5 |
5 |
5 |
5 |
All measurements are in inches.
How to Measure
- Waist: Align the front and back waistbands so they’re stacked on top of each other, then measure from edge to edge across the middle of the waistband, multiply by 2
- Thigh: Starting 1" below the crotch seam, measure straight across from edge to edge (not from seam to seam)
- Leg Opening: Measure across the bottom hem from edge to edge
- Inseam: Measure from the crotch seam down to the bottom of the leg hem, following along the inside of the leg
Materials & Care
- 4-way Stretch Fabric made from 92% recycled polyester (keeping plastic water bottles out of the ocean) and 8% spandex
- “Air Conditioning” Liner made from 90% polyester and 10% spandex
- Made in Vietnam
- Machine wash cold. Wash inside out. Do not bleach. Tumble dry low.
About Proof
Proof makes premium performance apparel for a life in motion. Built by us, for us, every piece is designed in Austin, then tested hard by the Huckberry and Proof teams all over the world. Whether it’s long travel days, early morning workouts, or time spent in the great outdoors, we focus on classic designs powered by modern performance fabrics that regulate temperature, wick sweat, and protect from the sun. The result is category-bending gear that performs hard, wears easy, and brings personality to everyday performance. This is gear for growth.
The Sweat Test Guarantee
Put your new Proof gear through its paces. If it does not meet your expectations, we'll accept your dirty laundry and issue a refund, no questions asked.
Terms and limitations here
