Made of 3mm thick neoprene. Thick neoprene material protects your chapstick from melting in the car or in the hot weather. Easy and convenient, no more fishing around in the purse or pockets for lip balm or lipstick, attaching it to your keyring, purse hardware, backpack and lanyard. It's suitable for that tail of fish shape can hold lipstick with a diameter of 0.787 inch. 2 1/5" Wx 4 1/8" L.