chill pal pva cooling towel (ocean blue) chill pal product precaution: these cooling towels are made of pva material. this is a harmless sponge like material; however, it is very absorbent. please avoid excessive use of the cooling towel, where the towel is in contact with the skin for longer than 30 minutes. the towel can absorb the moisture and oil from the skin, resulting in dry skin.