MSR Nite Glo Zipper Pulls (2 sets, 4 pieces) These zipper pulls are made of glow-in-the-dark material, making them easy to find in the dark. Please understand that these are used items and purchase based on the photos provided. These zipper pulls are made of glow-in-the-dark material, making them easy to find in the dark. Please understand that these are used items and purchase based on the photos provided.