I purchased the Halo Tech Comfort long sleeve bodysuit in gray and blue, both in the 18 month size. It's been a cold winter in our already cold house, and these bodysuits have been great additions under our child's pajamas at night and under clothing during the day. They are lightweight as described by previous reviewers, but that's because they are made with fabric similar to athletic wear like the Nike Dri-Fit line. These bodysuits are: high quality, a good fit, are soft and silky, have a hemmed cuff on the sleeves, and do not shrink.