A rugged organic cotton button down, the Project Twill LS is a timeless style designed to be worn every day, in any season.
Our organic cotton has a reduced environmental impact. Our organic cotton has a reduced environmental impact. Our organic cotton is certified to come from farms not using synthetic fertilizers, biocides, or GMO seeds. These along with other required better farming practices result in cotton production having a reduced impact on the environment as a result. Organic cotton used in the apparel line is primarily certified by GOTS (Global Organic Textile Standard). Learn More
We trust what we make because we use what we make. We trust what we make because we use what we make. All Black Diamond soft goods are warranted against defects in materials and construction for the practical lifetime of the product. Learn More
From clean climbing, to conservation, Black Diamond is committed to protecting the people and places we love.
Tough enough for climbing, built to handle anything. From days on the trail, miles on the road, hours at the office, our lifestyle apparel pays homage to our roots, while bringing style and functionality to our lives beyond the crag.
Overall rating: 4.7727275 / 5 from 44 reviews.
The Men's Project Twill Long Sleeve Shirt is praised for its perfect fit, high quality, and great weight. Customers appreciate the durable flannel and the shirt's versatile design, making it suitable for various activities. The color of the shirt is also highly praised by users.
Review topics: ["color","fit","weight","shirt","quality","fabric","material","flannel","thickness","stitching","layer","side","size","looks","cut","clothes"].
"The thickness is just right—not too thick, but not too thin either—which is what I like most about it. The stitching is sturdy, and the durability makes it well suited for heavy-duty work. I was a little concerned because there was no size option, but it actually fits me very well. Highly recommended!"
"Nice heavy weight, perfect for shoulder season temps"
"Soft cotton that doesn’t wrinkle and fits true to size. I’m 5’10 and the medium length is perfect. Durable mid weight and quality stitching will make it last for years."
"This is an excellent shirt for fall, winter, and spring. I really like the weight of the fabric and it's super comfortable."
"Was hesitant to buy with out feeling or trying it on. I only wish they offered their button ups in a Tall or Long variant. On sale this was a great price and shipped quickly! Thanks to the folks at Black Diamond!"
"Love the shirt. You know it’s one of those shirts that you’re going have for a long time."
"Love the stitch and weight of this check."
"Niceee"
"I'm 6'2" with an athletic build, the large fits well and feels very high quality."
"Excellent shirt. Excellent clothing. Yup!"
| Size | Chest | Hip | Arm Length |
|---|---|---|---|
| XS | 34 - 35.5 in 86.5 - 90 cm | 33.5 - 35 in 85 - 89 cm | 33.5 in 85 cm |
| S | 36 - 38 in 91 - 96.5 cm | 35.5 - 37.5 in 90 - 95.5 cm | 33.5 in 85 cm |
| M | 38.5 - 41 in 97.5 - 104 cm | 38 - 40.5 in 96.5 - 103 cm | 34 in 86.5 cm |
| L | 41.5 - 44.5 in 105 - 113 cm | 41 - 44 in 104 - 112 cm | 34 in 86.5 cm |
| XL | 45 - 48.5 in 114 - 123 cm | 44.5 - 48 in 113 - 122 cm | 34.5 in 87.5 cm |
Designed to fit slim to the body for an athletic, low-profile fit without restricting mobility and accommodating base layers or light midlayers.
A classic universal fit with comfortable ease. May feature slight body shaping, but predominantly straighter fit that will accommodate midlayers more comfortably.
Generous through the body for a casual loose-to-oversized fit without shaping. Designed for comfort, it accommodates heavier mid-layers.
Measure around the chest/bust just under the arms and across the shoulder blades.
Measure from the center back of the neck, across the shoulder, and down the arm to the wrist.
Measure around the widest point of the hips.
Measure around the narrowest part of the waist.
