I can really vouch for the staying-put power of these beauties. Mine arrived on Friday as part of my Year of Pants - and, seriously, if you've got a spare £21.50 a month, DO IT, there's nothing like getting gorgeous knickers every month, the surprise is just lovely! - anyway, back on topic...
I wore them this weekend for my day out at Latitude Festival. I wore them for 17 hours straight, walked about 6 miles, danced a fair bit to some brilliant bands, lounged on the grass, jumped up and down, and they didn't shift at all.
They didn't creep into my bum either! They just stayed put, stretched with me when I wanted them too and were super-soft and comfy all day. They're really true to size too - as with all WMYP - so no uncomfortable cutting in or chafing. And no rolling down over my tummy either.
If you want some lovely bright pink pants then these are the ones for you!