GTO 2/3 LS DermaSensor

Assos GTO 2/3 LS DermaSensor

The Assos GTO 2/3 LS DermaSensor is a long-sleeve base layer for cooler days in spring and autumn, designed as a second skin for athletic cycling in Switzerland. The climaCode 2/3 represents ASSOS's transitional seasons and marks the range of use between summer and winter. At its heart is the DermaSensor textile: a breathable, stretchy and odor-resistant material that's manufactured as a seamless single piece, making it particularly comfortable under thermal jerseys or lightweight jackets. This way, the layer keeps your microclimate dry and stable when it's fresh in the morning and warmer in the afternoon. The construction targets long rides where low volume, fast moisture transport and reliable insulation are crucial.

• climaCode 2/3 (Spring/Fall): optimized for cool conditions in transitional seasons.
• DermaSensor 3D‑Jacquard, warp‑knit: extremely soft, seamless and durable; manufactured as a finished single piece rather than from sewn-together panels.
• Moisture management with light insulation: wicks sweat away from the skin and supports a warm-dry microclimate under jersey or shell.
• Raw-cut sleeves without hems: minimal volume for better layering; sleeves can be shortened if needed.
• RegularFit: close to body but comfort-oriented for long training sessions and versatile layering.
• Material: 45% Polyamide, 43% Polyester, 12% Elastane.
• Sizes 0–III, color blackSeries; manufactured with focus on durability and odor control.
• ASSOS Warranty & Crash Policy provide additional security after purchase.

Technical Details and Functions

The DermaSensor fabric belongs to ASSOS's most technically demanding materials: three-dimensional Jacquard tube knit with true seamless construction that comes directly as a finished garment from the loom. This creates no disruptive seams that could cause friction, and the layer virtually disappears between skin and thermal clothing. The combination of high elasticity and gentle compression keeps the fabric close to the skin so moisture is quickly transported outward. Raw cut at sleeves and hem reduces thickness and transition edges, making it easier to put on and take off under additional layers. For the 2/3 season, the material blend is tuned to provide light insulation without overheating when intensity increases. The true-to-fit RegularFit supports long hours in the saddle and various layering combinations with jerseys and lightweight jackets.

Applications and Benefits

On typical Swiss rides in the midlands, during fresh alpine descents or commuting through the city: this layer works when it's cool and changeable. Under a Spring/Fall jersey or lightweight shell, it regulates the microclimate, quickly absorbs moisture and prevents cooling during breaks or descents. Thanks to seamless construction, it harmonizes under bib straps and under close-fitting jackets without bulking up or chafing. The odor control also makes it suitable for everyday use on multi-day tours or quick afternoon intervals after the office. Independent tests highlight the DermaSensor family's particularly soft feel, low volume and strong breathability, which really pays off on longer rides. Combined with matching ASSOS Spring/Fall layers, your upper body stays dry and comfortably warm for hours.

Additional Layering Tips (optional)

For colder days, you can put the layer under a thermal jersey and windproof shell; this creates an efficient 3-layer system with high comfort. If your rides slip into true winter conditions, the GTO 3/3 (Winter) variant offers additional neck and throat protection with unchanged seamless construction. Within the ASSOS system, use under MILLE Spring/Fall pieces is explicitly intended because cut and material are perfectly matched. This keeps freedom of movement high while the microclimate stays stable and moisture transport remains active. When putting it on, make sure the layer sits directly on the skin so the push-pull effect of the fibers can work optimally. For long rides in the 2/3 season, this is a robust, low-maintenance solution with noticeable benefits in comfort and temperature management.