My son was in the&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Halo-Technical-Comfort-System-Two-Piece-Set-Silver-Gray-18-Months/dp/B0029F1JS6/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Halo Technical Comfort System Two Piece Set, Silver Gray, 18 Months</a>&nbsp;until way past 24 months, but they were getting a LITTLE small on him, so I thought the 4T would be great, and serve us well until he was at least 3 and maybe 4.

Ha.

HA HA.

These are only slightly larger than the 18mo size and are nearly impossible to get on over his ankles--and the arms and legs are tight! That said, my son is big for his age, but is right in the described weight limit (36#). But since we had had Halo jammies before, we assumed the sizing would stay the same and they would run larger.

So BOO for the sizing but YAY for the material, so three stars.