Waffle-Knit Thermal Underwear: Tactical Base Layer Made of Grid Fleece
Tactical Waffle-Knit Thermal Underwear: What to Look For
Waffle-knit thermal underwear has a mesh-like weave that manufacturers call grid fleece, honeycomb or waffle fleece. It is chosen by people who move a lot in the cold: on missions, on duty, while hunting or on winter hikes. Such underwear should keep you warm and, at the same time, not leave your body wet after exertion.
How Waffle Thermal Underwear Differs from Smooth Fabric
The inner side of this fabric has small cells. Air is trapped in them, and it works as thermal insulation. Channels between the cells let moisture escape from the skin to the outside. That is why grid fleece thermal underwear is warmer than thin smooth fabric, yet lighter and more breathable than solid fleece.
The downside is that the grid holds heat only under other clothing. In the wind, the air is quickly blown out of the cells, so without a jacket or softshell a waffle layer barely keeps you warm. Over time the pile surface may pill in areas that rub against a plate carrier or straps, which is normal for this kind of material.
Fit, Cut and What's Included
Take a look at the cut details, because they affect durability. For example, in the DUNAUONE model the raglan sleeve doesn't chafe under shoulder straps, and the sewn-in crotch gusset takes the load off the seams during squats and long strides. For active work, this matters more than color.
Also check exactly what you are buying. Most models are sold as a set of top and bottoms, while the Helikon-Tex US Level 2 is a top only, so you will have to choose the bottoms separately. Sizes are given in both letters and numbers, so check the size chart of the specific product.
When Waffle Knit Makes Sense and Which Color to Choose
Waffle-knit thermal underwear performs best on the move and in changing conditions: march, stop, then exertion again. Some models are also designed to serve as a mid layer. For example, the manufacturer describes the XGO Phase 2 Midweight as a base or mid layer for cool and cold weather. If you will be standing still for a long time, you will need an insulated layer over it.
Color matters when the top is worn without outerwear in a shelter or at base. Olive and coyote go with most uniforms, and multicam goes with the matching camouflage. For a wider selection, including smooth-knit and women's models, see the tactical thermal underwear section.
Frequently Asked Questions
Can waffle-knit underwear be worn as a second layer?
Yes, and it is often a good option. Thin smooth underwear is worn under it, with a jacket on top. The grid between them adds warmth and doesn't stop moisture from escaping.
How do I wash grid fleece thermal underwear?
Wash on a gentle cycle at a low temperature, inside out. Do not use fabric softener: it clogs the cells and reduces moisture wicking. Dry it away from a radiator and without a tumble dryer so the fabric keeps its shape.