We haven't had any leaks so far using these with a 4-layer insert (or two 4-layer inserts for sleep) for our 2.75yo. He outgrew One Size Fits Most nappies before he is ready to regularly use the toilet for wee, so these have been a great alternative. Really appreciate the flexibility from having the pocket (e.g. can use with cloth nappy prefolds we already have for nights), especially as he refused to use boosters in some training pants we already had, where they just clipped in on top, against the skin (which he found uncomfortable). Also appreciate the approx leg and waist measurements being included for working out sizing, as his weight fits well within the XS range but we ended up needing M to fit comfortably around his (chunky) thighs.
