Diaper brand for long and lean babies (available in Canada)?

Hi there,

My 12 weeks old son is very long (99th percentile) and thin. I’m currently using the Pampers Pure and have had several poop blow outs. It always leaks near his thighs so I’m thinking it’s not tight enough for him. I’ve tried downsizing but he’s too tall for size 1 (currently on size 2). We had the same accidents with the Pampers Swaddlers…

Anyone has a long and lean baby like mine? If so, what brand are you using? I’m seeking a fragrance free, no parabens, no chlorine type of diaper.

Thanks!