Stash your cards and cash in one convenient place with our Cell Phone Envelope. These vegan leather envelopes have a super adhesive back that sticks to your phone, so you always have access to the important things. Please Note: The adhesive is designed for optimal use on hard plastic phone cases. Adhesion may weaken over time with regular use, especially on softer materials like silicone cases. For best results, we recommend using the cell phone wallet on clean, hard surfaces. California residents: WARNING,please click here for Prop 65 warning