Cellphone Sleeve

First time working with Tyvek material. Wanted to make a simple sleeve for my cellphone because it gets sweaty and gross from back/body after my runs. I could've easily just used a plastic ziplock bag, but that would be boring. This upcycling method is my proof of concept to build more complex gear like backpacks or tote bags. The only thing I would add to this is a strap with a snap button to prevent the phone from falling out. Overall, super easy and fun process to use my old race bibs to make something useful for myself.