Mountain Hardwear Women's Butterlicious Long Sleeve 1/2 Zip Top 100% Polyester Imported Zipper closure Wick.Q - Moisture-wicking keeps you cool and dry. Antimicrobial Finish - Minimises odour. Half-Length Zipper With Chin Guard - Ensures ventilation and comfort. Thumb Loops - Provides extra coverage and makes sure the sleeves won't ride up. UPF 50