What Our Gearhead® Experts Are Saying:"I picked up the Jacobs 1/2-Zip Top for a young hiker in my family before a sunny day on the mountain and the UPF 50+ protection meant one less thing to worry about. He loved getting to pick out his favorite graphic before we headed out."The Jacobs 1/2-Zip Top from Spyder is built for the young skiers who want their gear to look as good as it performs. This is a base layer for bright, sunny days on the mountain, the 100% polyester knit offering UPF 50+ protection so sun exposure stays out of the equation while the half zip design makes temperature regulation easy between runs.