My DD and I (me, mostly) were worried about the blister issue over Plebe Summer. I thought it was silly to treat the wound and not prevent the problem, so we bought 6 pairs of sock liners from REI. They are sold at most out-door kinda stores (Campmor), they were about $6 a pair. I asked her on Tuesday night when we chatted about her feet, if she'd been wearing the sock liners and if they helped. She said she hadn't had even 1 blister all summer and had been wearing them faithfully. She wore them to I-Day so that with all the fittings, they were on her feet. She said they have saved her feet, her roommate and others in her squad have raw meat on their feet from the friction caused by socks and boots. She can't send them to the laundry so she's just washing them out in her sink (occasionally) but doesn't care if they're a bit dirty (hahaha) Just thought I'd pass this tip along. I'm hot a big hiker, but my husband and 2 boys just went on an 11 day hike and wore the liners. They were recommended by the Boy Scouts to prevent blisters...they work!