Zipadee Zip Or Merlin’s Sleep suit for 3 month old who’s 18 pounds?

Robin • Married since August 2015. TTC our first baby 👶🏻!

My son is almost 3 months and a big guy 18 pounds and is growing out of the halo swaddle ant day. Which swaddle transition have you had luck with? The Merlin’s sleep suit is only good for 18-21 pounds so I’m not sure if it’ll be worth it with how fast he grows.