About These Tanks
Breathable Build, All-Day Ease
Mindful Materials, Minimal Design
Frequently Asked Questions
You've got questions, we've got answers
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Move with ease in Sustain Tanks designed for studio sessions, travel, and everyday layering. A clean athletic cut, breathable comfort, and lightweight feel keep you centered on and off the mat. The fabric sits smoothly against skin so you can focus on form, breath, and flow.
A refined silhouette sits smoothly over shorts or joggers and will not ride up during flow. The armholes and neckline are shaped for mobility so you can move freely through warmups, peak poses, and cooldowns. Subtle detailing keeps the look minimal while supporting confident movement.
Lightweight, quick-drying comfort helps regulate temperature from class to commute. Soft against skin and easy to layer, these tanks transition seamlessly from practice to daily wear. The fabric dries quickly after intense sessions so you stay comfortable longer.
Crafted with eco-conscious materials and durable construction, Sustain Tanks hold their shape and color over time. The minimalist aesthetic makes them simple to style across your active wardrobe. Fewer distractions and thoughtful finishes make them a go-to layer every week.
You've got questions, we've got answers
Yes. The breathable build and athletic cut support full range of motion for yoga flows, cross-training, and recovery days. The fit stays close without restricting movement.
Absolutely. The streamlined profile sits clean under mid-layers without bulk, ideal for warmups and cooler mornings. It also pairs well with lightweight outerwear after class.
They are form-following without feeling tight, with comfortable stretch that stays put through movement. Choose your usual size for a close, athletic feel.
Yes. Sustain Tanks prioritize responsible materials and long-wearing construction for lower-impact performance, season after season.
Yes. The tank is designed to retain structure and softness through repeated wear and washes, helping it look fresh longer.
Pair a Sustain Tank with 4-rth joggers or eco track shorts for a balanced studio-ready outfit, then add a lightweight layer for the commute.
The quality of these, amazing, it’s like heaven touching your skin. I’m 6’5, about 210, large was a great fit. The company is very receptive and reaches out quickly when I had issues with my package being stolen. I went and purchased two more pairs. Outstanding
I think that ive got them all! These are perfect for the gym, especially because of the longer torso length/fit. I also love the capri pants for workouts when its hot out.
I was skeptical about how exactly I would use these - are they a sweatpant or a going out pant? Turns out they're both! They're more comfy than most lounging pants I've worn, yet can totally be worn as a regular pant. I like using them for yoga; the zipper and buttons don't get in the way too much at all.
They are quite slim, but not as skin-tight as I expected based on the description, and they are quite long. I am 5'11" and 170-175 lb with pretty thick thighs and the medium is perfect. I had to hem off about 3". That being said, I do not have the longest legs for my height, and prefer a shorter inseam. If you are taller or don't mind them hitting a bit below the ankle as in the photos, it won't be an issue.
The only feedback I have would be - please offer these in a shorter inseam, and I would love to see larger back pockets in the future. I don't love the look of small back pockets, but they aren't so noticeable in the black. By the way, same for the short version of these - the length is quite long, and would love a slightly shorter version.
I love your products. This one is great as well, although for me I’d prefer a bit longer in the body. Still love it though —thanks.
These are absolutely outstanding for my hot yoga practice. No uncomfortable bunching. Highly recommend
Well lets see, I have 5 pairs of these and many other shorts and pants from 4rth. My all time favorite clothing. Comfy, durable, fits amazing and inspires confidence, (form fitting without revealing). If I had to do yoga without 4rth clothing I'd be lost!
I absolutely love these shorts, bought 3 pairs already and will certainly get more!
I took a break from my workouts in these cuffed men’s yoga pants but I am glad to be back. They fit great and hold their form through intense heated vinyasa practices. Thank you, Doug and Cesar!
Great fit. Love color. Very comfortable.
Fits great! Very stylish and bought a 2nd pair in another color. True to size. Very well made. May order one in every color!!
Been using these for years and have several pairs. Very comfortable and great for bendy movements like squats
These are the best fitting pants on the market.
The customer service is solid. High quality. Great value.
These are comfortable and cool all rolled into one. Great for kicking it back at home or any casual event. Yoga. Running. There is no limit.
Absolutely love the fit and feel.
These are hands down the most comfortable and attractive shorts I’ve ever owned. I’ve never gotten as many compliments about an article of clothing before (all from women, fwiw). I have these in three different colors but these seem to get the most positive feedback. I’ve worn them to the beach (even swam in them), to the grocery store, to Pilates. Had to get up my nerve to go all white in public (with no underwear) but it was totally rewarding. They’re the best.
The quality of these, amazing, it’s like heaven touching your skin. I’m 6’5, about 210, large was a great fit. The company is very receptive and reaches out quickly when I had issues with my package being stolen. I went and purchased two more pairs. Outstanding
I think that ive got them all! These are perfect for the gym, especially because of the longer torso length/fit. I also love the capri pants for workouts when its hot out.