Designed for Cold Weather Comfort
Breathable Thermal Technology for All-Day Wear
Eco-Conscious and Durable Fabric
Frequently Asked Questions
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The Thermal V-Neck Long Sleeve shirts combine eco-friendly materials with thermal technology to provide warmth without bulk. Perfect for layering or wearing on its own, this long sleeve shirt keeps you comfortable whether you’re tackling outdoor adventures or enjoying cozy indoor moments.
Crafted from thermal fabric, the V-neck cut offers a sleek and flattering silhouette. This shirt provides just the right amount of warmth for chilly days without feeling too heavy, making it perfect for layering under jackets or wearing solo.
The breathable, moisture-wicking fabric helps regulate body temperature, ensuring you stay comfortable during outdoor activities or when lounging indoors. The V-neckline adds a touch of modern style, keeping you looking sharp while you stay warm.
Made from sustainable materials, this shirt not only keeps you warm but also supports a more eco-friendly lifestyle. The high-quality construction ensures durability and softness, maintaining its shape and comfort after multiple washes.
You've got questions, we've got answers
The fit is slightly tailored, offering a modern and flattering silhouette without being too tight. It’s ideal for both layering and wearing as a standalone piece.
Yes, the slim design and smooth fabric make it perfect for layering under coats, jackets, or hoodies without adding unnecessary bulk.
The thermal fabric traps body heat, providing insulation while still being lightweight and breathable. It’s perfect for cold days and active wear.
Machine wash cold and tumble dry on low heat. Avoid using fabric softeners to preserve the integrity of the thermal fabric.
This shirt is made with sustainably sourced materials that reduce environmental impact, ensuring you stay warm and stylish while supporting a more sustainable wardrobe.
Definitely! The thermal fabric is perfect for active outdoor wear, keeping you warm and comfortable without overheating.
Pair it with jeans or joggers for a casual look, or layer it under a sweater or jacket for added warmth during colder months.
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 feel great to wear, I love how soft and well made they are. Theses will last me another 10 years like my last pair.
Great products! Have bought multiple pairs of their pants and tanks. It's nearly impossible to find good yoga clothes for men/masc identifying people, and 4-rth is one of the best out there. Highly recommend.
4-RTH is the best most eco friendly , good for your body and feels so good on ! Best for yoga , gym and all around one of the best quality ECO products on the market ! Thanks for keeping us sexy , fit and comfortable:) mahalo from Hawai’i!!
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.
Excellent look and size!
Excellent look and size!