Designed for cold-weather adventures and active layering, the Rab Syncrino Base LS Tee combines the natural warmth of Merino wool with the durability and quick-drying performance of synthetic fibres. Made from lightweight Syncrino™ 125 fabric, this long-sleeve thermal baselayer provides breathable insulation, moisture-wicking comfort and natural odour resistance. With a soft, stretchable construction and low-bulk seams, it is ideal for hiking, trekking, mountaineering and winter travel, especially during multiday adventures in colder conditions.

Features

• Syncrino™ 125 Fabric – Lightweight Merino wool and polyester blend provides breathable warmth, moisture management and durability during cold-weather activities.

• Merino Wool Insulation – Naturally insulating fibres help regulate body temperature and maintain comfort in cool and damp conditions.

• Quick-Drying Performance – Synthetic fibres improve drying speed and durability, making the baselayer suitable for active use and demanding mountain environments.

• Natural Odour Resistance – Merino wool helps reduce odour buildup, maintaining freshness during extended wear.

• Moisture-Wicking Comfort – Fabric helps move perspiration away from the skin to maintain comfort and regulate body temperature during physical activity.

• Lightweight Thermal Protection – 125gsm fabric provides comfortable insulation without unnecessary bulk.

• Soft and Stretchable Fabric – Flexible construction offers a comfortable next-to-skin feel while supporting natural movement.

• Low-Bulk Seams – Smooth seam construction helps minimise friction and discomfort when worn beneath additional layers.

• Set-In Sleeves – Classic sleeve construction provides a comfortable fit and freedom of movement.

• Single Jersey Construction – Lightweight knitted fabric offers a soft feel and breathable performance.

• Recycled Synthetic Fibres – Contains 32% recycled polyester fibres to reduce reliance on virgin materials.

Specifications

Warmth & Performance

Syncrino™ 125 Merino Wool Blend Technology

The Rab Syncrino Base LS Tee features Syncrino™ 125 fabric, combining the natural insulating and moisture-managing properties of Merino wool with the durability and quick-drying performance of polyester fibres.

Merino wool helps regulate body temperature, wick moisture and provide warmth even in damp conditions. The synthetic fibres improve durability, shape retention and drying speed, making the fabric suitable for active outdoor pursuits.

Its lightweight 125gsm construction provides breathable next-to-skin insulation without excessive bulk, allowing comfortable layering beneath fleece jackets, insulated midlayers or waterproof outer shells during colder adventures.

Sustainability

Merino Wool & Recycled Polyester Blend

The Syncrino™ 125 fabric combines 47% Merino wool with 53% polyester, including 32% recycled polyester. By incorporating recycled synthetic materials, Rab helps reduce reliance on virgin resources while maintaining the durability, moisture management and lightweight performance required for technical outdoor baselayers.

Care Instructions

• Machine wash cold on a gentle or wool cycle

• Use mild detergent suitable for wool garments

• Wash with similar colours

• Do not bleach

• Air dry naturally

• Avoid tumble drying at high temperatures

• Do not use fabric softener

• Avoid excessive heat to help maintain fabric performance