Seventy Degrees SD-CT1 Seamless Carbon Thermal Long-Sleeve Base Layer – Unisex Black/Grey

The base-layer shirt is the most-worn and least-considered piece of riding kit — and the wrong one quietly ruins a good day, soaking up sweat and holding it cold against your chest at the next stop. The Seventy Degrees SD-CT1 long-sleeve replaces that with a layer that manages your core actively, jacket on or off.

Key Features

• Full seamless carbon-fibre construction — friction-free under any jacket
• Continuous moisture transfer from skin to outer face for rapid evaporation
• SPF50 structural — consistent through the life of the garment
• Silver-ion antibacterial — multi-day touring without daily washing
• Antistatic — stops the charge cycling between synthetic layers
• Stretch fit, long sleeves, machine washable — unisex XS-S to 3XL-4XL

Active, Not Passive

Standard polyester base layers absorb sweat and hold it. The SD-CT1's seamless carbon fabric does the opposite: it continuously moves moisture off the chest, back and arms to the outer surface and evaporates it, keeping the skin dry through sustained riding, rest stops and walking around at the destination. The difference is most obvious in that first cold moment after you stop — where a wet cotton tee turns into a cold compress and this doesn't.

Structural Sun Protection

SPF50 is engineered into the carbon fibre itself, so the protection is the same on day one and after fifty washes — it can't rinse away like a surface finish. Worth having when you ride mesh jackets or roll sleeves up off the bike.

Odour and Static Control

Silver ions bonded at fibre level permanently disrupt odour-causing bacteria, so the shirt survives a multi-day trip without smelling like one. The antistatic system prevents the electrostatic build-up that makes synthetic layers cling and spark — a small thing that matters over a full touring day.

Fit and Sizing

A close, elastic stretch fit follows every riding posture — shoulders forward, arms out to the bars — with no seams to chafe under armour or a pack. Long sleeves reach the wrist under gloves. Choose by height and build; size up between ranges for sleeve length. XS-S, M-L, XL-XXL, 3XL-4XL, unisex.

Care

Machine wash cool, skip the softener, line dry. Performance is in the fibre and lasts the life of the shirt.