i use AI2s as then i can use them more, the 6layer inserts are better imho as the 4layer last about an hr versu 3 hr for the 6layer. i find they gape a little with the 4layer one but not the 6layer. probably the extra padding. lol. xx
We love our WN AI2s, they fit Mouse really well, she's long and thin. We go for the high rise, as they are more comfy on her hips and help keep her trousers up better! We've been using ours for about a year, and we still have loads of rows of snaps to go.