Billabong Polypros Girls Furnace Thermal Short Sleeve Top. Can simply be worn with boardshorts in warmer water or worn under your winter wetsuit for added warmth. A great thermal option if you feel restricted by long sleeves. , Polypropelyne under garment, Furnace Thermal Lining, Flatlock Stitch, 8OZ Lycras Gusset, Thumb Loop, Boardshort Fastener, , ,