DF Mesh Merino is Yamatomichi’s original base layer series, designed to overcome the common drawbacks of traditional 100% merino wool—such as slow drying, stickiness when wet, and heat retention.

While maintaining the natural comfort, odor resistance, and moisture regulation that wool is known for, the double-face (DF) mesh construction actively wicks sweat away, dries quickly, and prevents heat buildup. When layered under a shell, it provides warmth, yet even during intense activities like trail running or fastpacking, it remains comfortable thanks to its point-contact structure that minimizes clinginess when sweating.

The DF Mesh Merino series has a mesh structure to accelerate the air-permeability. It is far more breathable than the conventional merino fabrics, keeping you dry and cool even when performing intensive and sweaty exercises.

The skin surface in 100% merino wool offers comfortable touch so that the mesh fabric comes into contact with your skin by multiple points rather than by one large surface to minimize skin irritation when you sweat.

The skin side is hydrophobic-finished to quickly dispense of any moisture (sweat), while the surface is hydrophilic-finished so that the fabric absorbs the released sweat, keeping your skin feeling dry.

The DF Mesh Merino’s fast-drying properties outperform the conventional merino fabric, preventing you from being cold from your own sweat because of the slow-drying fabric.

Hiking

The DF series is suitable for various temperature zones and perfect for long-term and multi-seasonal mountain hikes.

The synthetic fabrics can be smelly for several hours after you sweat, even when they are deodorant finished, and you don’t want to wear them the next day. On the other hand, our DF Mesh Merino has a high percentage of the wool mixture and thus has a powerful and natural anti-odor performance.

It is also fast-drying and can be worn for many hours and even days without washing, reducing the need for extra changes in your backpack.

Trail Running, Fast Packing

The DF series’ elastic fabric smoothly follows your dynamic movements and is perfect for intensive and sweaty exercises such as trail running and fast packing.

The highly absorptive dual-layer mesh fabric will keep you dry even when you sweat heavily. It is also lightweight and less likely to gain weight as it dries quicker than normal wool fabrics. The highly air-permeable fabric will let the wind pass and keep you cool when worn by itself, while it is warm if you wear it under a shell jacket. It is perfect when you need both thermal performance AND sweat/heat permeability.

Please note that it is warm, and you may feel it’s too warm at low-altitude mountains in mid-summer.

In Bad Weather with Changing Temperature

The dual-layer DF Mesh Merino is highly air-permeable and will keep you cool when it’s hot, while quickly warming you up if you wear it below a light shell jacket.

It is warm even when soaked with rain because it is made of wool with humidity-control performance and heat-generating properties. It is especially suitable under severe conditions with large temperature differences between day and night, mountaineering from low to high altitudes, and climbing where inclement weather is expected.

The DF Mesh Merino performs better than our conventional 100% Merino fabrics in many respects; According to our in-house test result, the DF’s air permeability is approximately three times as 100% Merino fabric, 2.5 times as fast-drying, and 1.4 times as heat-retentive. In addition, the fabric has a high level of humidity control and odor resistance, which are derived from natural wool.

However, the wear resistance is, on the other hand, only 40% of our conventional 100% Merino fabrics, with almost equal burst strength, meaning that the DF can easier develop snags, pillings, and holes.

In general, quick-drying performance and moisture absorption or cooling performance, and heat retention performance are inversely related, with one being higher and the other lower.

The DF Mesh Merino, however, achieves these contradicting properties at the same time; Quick-drying AND moisture absorptive, cool AND warm. The DF demonstrates high functionality in areas where synthetic base layers with superior quick-drying and cooling performance have excelled.

Wool base layers are chosen by many hikers for the material’s excellent odor-neutralizing performance. Some say it’s almost odor-free even after a week of heavy hiking, but we’ll let you (and your friends) be the judge of that…

What to wear is an eternal challenge. In highly intensive activities in conditions with large differences in temperature, you feel too warm and stuffy if the clothes are too warm, while increased breathability could lead to the risk of being too cold.

We recommend 100% merino wool fabrics with excellent moisture control, heat retention, deodorant, and resistance to cooling when wet, etc. However, we have to admit that there have been cases where merino wool is not comfortable, especially when it’s too warm and you sweat heavily. The DF Mesh Merino is the proprietary fabric that we have developed over the past two years to overcome these issues.

The DF (double face) is a dual-layer mesh structure; The skin side is a mesh made of 100% merino wool and is hydrophobic-finished to keep the water away, contacting your skin by points rather than by a single layer to keep you always comfortable. The surface side, on the other hand, is flat-knitted and hydrophilic-finished for better sweat absorption. The fabric is made of synthetic/merino yarn, that is, a nylon core wrapped by the merino yarn to increase durability and quick-drying properties. As such, the double-face fabric keeps you dry and offers you maximum comfort even under the changing weather.

The excellent air permeability will keep you cool when you are on the move while keeping you warm when you stand still. It is even warmer if you wear a windproof jacket. As a result of the wool blend ratio being approximately 90%, it also exhibits excellent natural-derived properties such as deodorant and moisture control.

The above measurements are taken before washing.

• Due to the nature of the stretchable knit fabric and sewing tolerances, there may be slight differences between the actual measurements and the listed dimensions.
• The fabric stretches with wear and shrinks after washing, but the rate of stretch and shrinkage may vary between individual pieces.
• Stretch and shrinkage rates may also vary depending on the type of washing machine or wash cycle used.
• If you notice shrinkage after washing and drying, it can be improved by using a steam iron while gently stretching the fabric.

The DF Mesh Merino has an uneven mesh-like surface structure, which can easily develop snags, pillings, and holes by the friction with the backpack straps if it is worn by itself.

Wool is a short fiber material that tends to lose fibers when rubbed against something coarse and hard. It is relatively thin and prone to holes compared to synthetic fibers or cotton. Therefore, the DF requires more care than normal woolen knit fabrics when you walk in the bushes or rocks, or when it is in contact with hard mesh.

Please wear a shell jacket or shirt over it instead of wearing it alone if you use it in a hard situation. The DF fabric is highly breathable and allows the wind to permeate easily, so wearing a shell jacket is a great idea to keep you warm.

Please note that when this product in Black color is in contact with a white or light-colored shirt in wet condition, color may transfer.

• Please wash separately or use the laundry net bag.
• Mesh fabrics are prone to deform or distort. After washing, adjust the shape of the product and dry it flat.
• Hydrophobic and hydrophilic properties are added in the later process and are not natural. They may be weakened with use.
• When you store the item, use mothballs and/or vacuum storage bags to keep out insects.