http://www.ubykotex.com/legal/legal-statement#guarantee

Next Pack Guarantee

Mail in Reimbursement of up to $5. Proof of purchases of U by Kotex® product and competing product required. Eligible products vary. Only for purchases of eligible U by Kotex products made between 5/6/13 and 7/31/13 and subsequent purchase of competing product. Claim end date: 8/31/13. Valid only in US and Canada (except Quebec). Limit one claim per person. Restrictions apply. See reimbursement form for full details.
MIR Form: http://www.ubykotex.com/downloads/pd...antee_form.pdf