Packable Pogies"They look funny but they work!" Keep your hands nice and toasty with these! Super easy to install Give your fingers plenty of room. Reflective edge material that is crazy bright when light hits it! Pack small to fit almost anywhere (that's both of them in the mug!). or just roll them up on your bars! Tyvek is made from recycled house wrap (brands vary) Proper is Xpac vx07 Biggest difference is the color.