Babywearing parents, help me choose between LennyLamb and Tula. I need the more breathable option, the one that can be useful for longer hours without giving me some backaches and the one that can be used for years (in terms of sizing).

Tula has a bit of edge when it comes to wearability. According to some moms, they can use Tula for longer months because it doesn't get outgrown easily. Most moms also get the "sweet spot" from Tula compared to LennyLamb. As for the breathability, ordinary LennyLamb is better than Tula. Tula now has its mesh option, Tula Coast. It's more breathable compared to ordinary Tulas and even better than LennyLamb, I think.