Shipping labels feature Cover-Up technology that completely blocks any writing underneath, so you can easily reuse boxes, envelopes and more and your mail ships out the door looking neat and professional. Use your printer to create professional-looking labels. Jam-free, smudge-free labels work with popular shipping software tools. Strong, permanent adhesive sticks securely, so labels stay put. Label sheet is perforated to allow easy separation into label and receipt portion.