The Patagonia Capilene Cool Daily is ideal for most hikes, offering moisture-wicking polyester, quick-drying performance, and durable seams. For merino wool lovers, the Icebreaker Mens Merino 150 Tech Lite III T-Shirt balances breathability and odour resistance. Both are lightweight and resist abrasion from backpacks.

Hiking shirts protect against UV rays, wick sweat, and reduce chafing. Features like UPF ratings (e.g., Patagonia’s 40+ UPF) and ventilation panels (e.g., Fjällräven’s cuff slits) enhance comfort. Shirts also offer storage (e.g., Ayacucho’s HHL-treated options with insect resistance) and durability for rough terrain.

Recycled polyester is lightweight, quick-drying, and eco-friendly. Merino wool offers natural odour resistance. For insect-prone areas, Ayacucho’s HHL-treated shirts add bite protection. Avoid cotton—it retains moisture and dries slowly.

A hiking shirt should fit snug but not restrictive, allowing full arm movement. Check Cotswold Outdoor’s size guides—opt for a breathable fit with 2–3cm ease at the chest. Avoid excess fabric that snags on packs.

Merino wool is a natural fibre that provides excellent insulation even when wet, is highly breathable, soft against the skin, and has natural antimicrobial properties that prevent odour build-up over multiple days of wear.

A shirt with a UPF (Ultraviolet Protection Factor) rating provides an extra layer of defence against harmful UV rays. It's a very useful feature for long days spent in the sun, especially at high altitudes.

Yes, modern flannel shirts made from technical polyester or wool blends are a great option for hiking in cooler weather. They offer a good combination of warmth and moisture-wicking performance.