Long sleeves protect you better in a fall, and can be pulled up for climbing. A mid-weight Polypro is great for cold and wet weather. Cotton is good in warmer weather. Long sleeves protect you better in a fall, and can be pulled up for climbing. A mid-weight Polypro is great for cold and wet weather.
Many choices are available.
A lighter shell is better because you are more likely to take it and use it. Packs small, yet adds significant warmth for your legs. Sunscreen to protect your skin from the high altitude sun. Sunglasses or sports shield that provide eye and wind protection. Compass and maps.